UR Devourer Combo by Federico Macalli

Main Deck

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.
Chromatic Sphere
Artifact
, , Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.
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.
Mind Stone
Artifact
: Add .
, , Sacrifice Mind Stone: Draw a card.
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.
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.
Chromatic Sphere
Artifact
, , Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.
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.
Mind Stone
Artifact
: Add .
, , Sacrifice Mind Stone: Draw a card.
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.
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.
Chromatic Sphere
Artifact
, , Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.
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.
Mind Stone
Artifact
: Add .
, , Sacrifice Mind Stone: Draw a card.
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.
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.
Chromatic Sphere
Artifact
, , Sacrifice Chromatic Sphere: Add one mana of any color. Draw a card.
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.
Mind Stone
Artifact
: Add .
, , Sacrifice Mind Stone: Draw a card.
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.
Altar of Dementia
Artifact
Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.
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.
Defense Grid
Artifact
Each spell costs more to cast except during its controller's turn.
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.
Tsabo's Web
Artifact
When Tsabo's Web enters the battlefield, draw a card.
Each land with an activated ability that isn't a mana ability doesn't untap during its controller's untap step.
Altar of Dementia
Artifact
Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.
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.
Defense Grid
Artifact
Each spell costs more to cast except during its controller's turn.
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.
Tsabo's Web
Artifact
When Tsabo's Web enters the battlefield, draw a card.
Each land with an activated ability that isn't a mana ability doesn't untap during its controller's untap step.
Altar of Dementia
Artifact
Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.
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.
Defense Grid
Artifact
Each spell costs more to cast except during its controller's turn.
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.
Tsabo's Web
Artifact
When Tsabo's Web enters the battlefield, draw a card.
Each land with an activated ability that isn't a mana ability doesn't untap during its controller's untap step.
Altar of Dementia
Artifact
Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.
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.
Defense Grid
Artifact
Each spell costs more to cast except during its controller's turn.
Sky Diamond
Artifact
Sky Diamond enters the battlefield tapped.
: Add .
Crystal Vein
Land
: Add .
, Sacrifice Crystal Vein: Add .
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.
City of Traitors
Land
When you play another land, sacrifice City of Traitors.
: Add .
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.
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

Pyroclasm
Sorcery
Pyroclasm deals 2 damage to each creature.
Pyroclasm
Sorcery
Pyroclasm deals 2 damage to each creature.
Pyroclasm
Sorcery
Pyroclasm deals 2 damage to each creature.
Hoodwink
Instant
Return target artifact, enchantment, or land to its owner's hand.
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.
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.
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.
Pyroblast
Instant
Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.
Overload
Instant
Kicker (You may pay an additional as you cast this spell.)
Destroy target artifact if its mana value is 2 or less. If this spell was kicked, destroy that artifact if its mana value is 5 or less instead.
Overload
Instant
Kicker (You may pay an additional as you cast this spell.)
Destroy target artifact if its mana value is 2 or less. If this spell was kicked, destroy that artifact if its mana value is 5 or less instead.
Overload
Instant
Kicker (You may pay an additional as you cast this spell.)
Destroy target artifact if its mana value is 2 or less. If this spell was kicked, destroy that artifact if its mana value is 5 or less instead.
Hydroblast
Instant
Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.
Hydroblast
Instant
Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.
Hydroblast
Instant
Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.