Devourer Combo by Samuele Borgheresi

Main Deck

Phyrexian Devourer
Artifact Creature — Phyrexian Construct
When Phyrexian Devourer's power is 7 or greater, sacrifice it.
Exile the top card of your library: Put X +1/+1 counters on Phyrexian Devourer, where X is the exiled card's mana value.
Fling
Instant
As an additional cost to cast this spell, sacrifice a creature.
Fling deals damage equal to the sacrificed creature's power to any target.
Altar of Dementia
Artifact
Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.
Impulse
Instant
Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.
Tinker
Sorcery
As an additional cost to cast this spell, sacrifice an artifact.
Search your library for an artifact card, put that card onto the battlefield, then shuffle.
Phyrexian Devourer
Artifact Creature — Phyrexian Construct
When Phyrexian Devourer's power is 7 or greater, sacrifice it.
Exile the top card of your library: Put X +1/+1 counters on Phyrexian Devourer, where X is the exiled card's mana value.
Fling
Instant
As an additional cost to cast this spell, sacrifice a creature.
Fling deals damage equal to the sacrificed creature's power to any target.
Altar of Dementia
Artifact
Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.
Impulse
Instant
Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.
Tinker
Sorcery
As an additional cost to cast this spell, sacrifice an artifact.
Search your library for an artifact card, put that card onto the battlefield, then shuffle.
Phyrexian Devourer
Artifact Creature — Phyrexian Construct
When Phyrexian Devourer's power is 7 or greater, sacrifice it.
Exile the top card of your library: Put X +1/+1 counters on Phyrexian Devourer, where X is the exiled card's mana value.
Fling
Instant
As an additional cost to cast this spell, sacrifice a creature.
Fling deals damage equal to the sacrificed creature's power to any target.
Altar of Dementia
Artifact
Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.
Impulse
Instant
Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.
Tinker
Sorcery
As an additional cost to cast this spell, sacrifice an artifact.
Search your library for an artifact card, put that card onto the battlefield, then shuffle.
Phyrexian Devourer
Artifact Creature — Phyrexian Construct
When Phyrexian Devourer's power is 7 or greater, sacrifice it.
Exile the top card of your library: Put X +1/+1 counters on Phyrexian Devourer, where X is the exiled card's mana value.
Fling
Instant
As an additional cost to cast this spell, sacrifice a creature.
Fling deals damage equal to the sacrificed creature's power to any target.
Altar of Dementia
Artifact
Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.
Impulse
Instant
Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.
Tinker
Sorcery
As an additional cost to cast this spell, sacrifice an artifact.
Search your library for an artifact card, put that card onto the battlefield, then shuffle.
Mind Stone
Artifact
: Add .
, , Sacrifice Mind Stone: Draw a card.
Chromatic Sphere
Artifact
, , Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.
Tangle Wire
Artifact
Fading 4 (This artifact enters the battlefield with four fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)
At the beginning of each player's upkeep, that player taps an untapped artifact, creature, or land they control for each fade counter on Tangle Wire.
Defense Grid
Artifact
Each spell costs more to cast except during its controller's turn.
Fellwar Stone
Artifact
: Add one mana of any color that a land an opponent controls could produce.
Mind Stone
Artifact
: Add .
, , Sacrifice Mind Stone: Draw a card.
Chromatic Sphere
Artifact
, , Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.
Tangle Wire
Artifact
Fading 4 (This artifact enters the battlefield with four fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)
At the beginning of each player's upkeep, that player taps an untapped artifact, creature, or land they control for each fade counter on Tangle Wire.
Defense Grid
Artifact
Each spell costs more to cast except during its controller's turn.
Fellwar Stone
Artifact
: Add one mana of any color that a land an opponent controls could produce.
Mind Stone
Artifact
: Add .
, , Sacrifice Mind Stone: Draw a card.
Chromatic Sphere
Artifact
, , Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.
Tangle Wire
Artifact
Fading 4 (This artifact enters the battlefield with four fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)
At the beginning of each player's upkeep, that player taps an untapped artifact, creature, or land they control for each fade counter on Tangle Wire.
Defense Grid
Artifact
Each spell costs more to cast except during its controller's turn.
Duress
Sorcery
Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.
Mind Stone
Artifact
: Add .
, , Sacrifice Mind Stone: Draw a card.
Chromatic Sphere
Artifact
, , Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.
Enlightened Tutor
Instant
Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.
Oath of Druids
Enchantment
At the beginning of each player's upkeep, that player chooses target player who controls more creatures than they do and is their opponent. The first player may reveal cards from the top of their library until they reveal a creature card. If the first player does, that player puts that card onto the battlefield and all other cards revealed this way into their graveyard.
Duress
Sorcery
Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.
Shivan Reef
Land
: Add .
: Add or . Shivan Reef deals 1 damage to you.
Ancient Tomb
Land
: Add . Ancient Tomb deals 2 damage to you.
City of Brass
Land
Whenever City of Brass becomes tapped, it deals 1 damage to you.
: Add one mana of any color.
Gemstone Mine
Land
Gemstone Mine enters the battlefield with three mining counters on it.
, Remove a mining counter from Gemstone Mine: Add one mana of any color. If there are no mining counters on Gemstone Mine, sacrifice it.
Crystal Vein
Land
: Add .
, Sacrifice Crystal Vein: Add .
Shivan Reef
Land
: Add .
: Add or . Shivan Reef deals 1 damage to you.
Ancient Tomb
Land
: Add . Ancient Tomb deals 2 damage to you.
City of Brass
Land
Whenever City of Brass becomes tapped, it deals 1 damage to you.
: Add one mana of any color.
Gemstone Mine
Land
Gemstone Mine enters the battlefield with three mining counters on it.
, Remove a mining counter from Gemstone Mine: Add one mana of any color. If there are no mining counters on Gemstone Mine, sacrifice it.
Crystal Vein
Land
: Add .
, Sacrifice Crystal Vein: Add .
Shivan Reef
Land
: Add .
: Add or . Shivan Reef deals 1 damage to you.
Ancient Tomb
Land
: Add . Ancient Tomb deals 2 damage to you.
City of Brass
Land
Whenever City of Brass becomes tapped, it deals 1 damage to you.
: Add one mana of any color.
Gemstone Mine
Land
Gemstone Mine enters the battlefield with three mining counters on it.
, Remove a mining counter from Gemstone Mine: Add one mana of any color. If there are no mining counters on Gemstone Mine, sacrifice it.
City of Traitors
Land
When you play another land, sacrifice City of Traitors.
: Add .
Shivan Reef
Land
: Add .
: Add or . Shivan Reef deals 1 damage to you.
Ancient Tomb
Land
: Add . Ancient Tomb deals 2 damage to you.
City of Brass
Land
Whenever City of Brass becomes tapped, it deals 1 damage to you.
: Add one mana of any color.
Gemstone Mine
Land
Gemstone Mine enters the battlefield with three mining counters on it.
, Remove a mining counter from Gemstone Mine: Add one mana of any color. If there are no mining counters on Gemstone Mine, sacrifice it.
City of Traitors
Land
When you play another land, sacrifice City of Traitors.
: Add .

Side

Oath of Druids
Enchantment
At the beginning of each player's upkeep, that player chooses target player who controls more creatures than they do and is their opponent. The first player may reveal cards from the top of their library until they reveal a creature card. If the first player does, that player puts that card onto the battlefield and all other cards revealed this way into their graveyard.
Oath of Druids
Enchantment
At the beginning of each player's upkeep, that player chooses target player who controls more creatures than they do and is their opponent. The first player may reveal cards from the top of their library until they reveal a creature card. If the first player does, that player puts that card onto the battlefield and all other cards revealed this way into their graveyard.
Pyroclasm
Sorcery
Pyroclasm deals 2 damage to each creature.
Pyroclasm
Sorcery
Pyroclasm deals 2 damage to each creature.
Pyroblast
Instant
Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.
Pyroblast
Instant
Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.
Red Elemental Blast
Instant
Choose one —
• Counter target blue spell.
• Destroy target blue permanent.
Red Elemental Blast
Instant
Choose one —
• Counter target blue spell.
• Destroy target blue permanent.
Duress
Sorcery
Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.
Duress
Sorcery
Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.
Seal of Cleansing
Enchantment
Sacrifice Seal of Cleansing: Destroy target artifact or enchantment.
Seal of Cleansing
Enchantment
Sacrifice Seal of Cleansing: Destroy target artifact or enchantment.
Rushing River
Instant
Kicker—Sacrifice a land. (You may sacrifice a land in addition to any other costs as you cast this spell.)
Return target nonland permanent to its owner's hand. If this spell was kicked, return another target nonland permanent to its owner's hand.
Tangle Wire
Artifact
Fading 4 (This artifact enters the battlefield with four fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)
At the beginning of each player's upkeep, that player taps an untapped artifact, creature, or land they control for each fade counter on Tangle Wire.
Defense Grid
Artifact
Each spell costs more to cast except during its controller's turn.