Boris Devilboon

a Demon enters the battlefield — 215 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

1. Blood Speaker — When a Demon enters thanks to Boris Devilboon, Blood Speaker returns itself from the graveyard

a Zombie enters the battlefield — 551 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

When Boris Devilboon enters:

1. Noxious Ghoul — shrinks a creature by -1/-1
2. Champion of the Perished — puts a +1/+1 counter on itself

a Wizard creature enters the battlefield — 242 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

1. Diviner's Wand — When Boris Devilboon enters, Diviner's Wand triggers

provide a creature to sacrifice — 869 cards in Boris Devilboon's colors can cause this.

1. Kethek, Crucible Goliath — Boris Devilboon makes fodder for Kethek, Crucible Goliath
2. Industrial Advancement — Boris Devilboon makes fodder for Industrial Advancement
3. Divergent Transformations — Boris Devilboon makes fodder for Divergent Transformations
4. Transmogrify — Boris Devilboon makes fodder for Transmogrify

865 other cards cause it too. These are the ones with the most connections.

a token is created — 1,303 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

When Boris Devilboon makes a Demon token:

1. Idol of Oblivion — draws you 1 card
2. Mirkwood Bats — makes each opponent lose 1 life

anything attacks — 6,499 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

When Boris Devilboon attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Grim Javelineer — gives +1/+0
3. ED-E, Lonesome Eyebot — puts a quest counter on itself
4. Fire Navy Trebuchet — makes a token
5. Misty Mountains Raider — puts 2 counters on a Goblin or Army
6. Razorkin Hordecaller — makes a token
7. Inti, Seneschal of the Sun — triggers
8. Gut, True Soul Zealot — sacrifices a creature or artifact
9. Cool but Rude — draws and discards
10. Swashbuckler Extraordinaire — sacrifices a Treasure

36 other cards care about it too. These are the ones with the most connections.

a creature attacks — 6,499 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

When Boris Devilboon attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Chorale of the Void — brings a card back
4. Ingris Stingerquill — deals 1 damage
5. Staff of Titania — makes a token
6. Saw — sacrifices a creature
7. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
8. Ultima Weapon — kills a creature an opponent controls
9. Total War — kills a creature
10. The Spear of Leonidas — triggers

92 other cards care about it too. These are the ones with the most connections.

a creature blocks — 6,499 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

When Boris Devilboon blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Carnage Gladiator — makes a player lose 1 life
3. Barrow-Blade — strips abilities
4. Heat of Battle — deals 1 damage
5. Battle Strain — deals 1 damage
6. Tide of War — sacrifices a creature
7. Dead-Iron Sledge — kills a creature

5 other cards care about it too. These are the ones with the most connections.

a creature deals combat damage — 6,499 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

1. Hive Mind Coprocessor — When Boris Devilboon deals combat damage, Hive Mind Coprocessor makes you lose life

84 other cards care about it too. These are the ones with the most connections.

a creature is cast — 6,529 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

When Boris Devilboon is cast:

1. Endrek Sahr, Master Breeder — makes that spell's mana value tokens
2. Summon: Brynhildr — grants haste
3. Oketra's Monument — makes a token
4. Screamer-Killer — deals 5 damage
5. Bontu's Monument — makes each opponent lose 1 life
6. Vanquisher's Banner — draws you 1 card
7. Skittering Horror — sacrifices itself
8. Skittering Skirge — sacrifices itself
9. Skittering Monstrosity — sacrifices itself
10. Hazoret's Monument — draws and discards

17 other cards care about it too. These are the ones with the most connections.

a nontoken creature enters the battlefield — 6,736 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

When Boris Devilboon enters:

1. Minion Reflector — makes a token
2. Molten Echoes — makes a token
3. Flameshadow Conjuring — makes a token
4. Mirror March — flips a coin

1 other card cares about it too. These are the ones with the most connections.

a creature enters the battlefield — 7,209 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

1. Slash, Reptile Rampager — When a Demon enters thanks to Boris Devilboon, Slash, Reptile Rampager deals 2 damage
2. Gimli of the Glittering Caves — When Boris Devilboon enters, Gimli of the Glittering Caves puts counters on a permanent
3. Wingnut, Bat on the Belfry — When a Demon enters thanks to Boris Devilboon, Wingnut, Bat on the Belfry grants flying, haste and menace
4. Ayara, First of Locthwain — When a Demon enters thanks to Boris Devilboon, Ayara, First of Locthwain makes each opponent lose 1 life
5. Blasting Station — When a Demon enters thanks to Boris Devilboon, Blasting Station untaps itself
6. General Kreat, the Boltbringer — When a Demon enters thanks to Boris Devilboon, General Kreat, the Boltbringer deals 1 damage
7. Raphael, Most Attitude — When a Demon enters thanks to Boris Devilboon, Raphael, Most Attitude exiles a card from your library
8. Mogg Bombers — When a Demon enters thanks to Boris Devilboon, Mogg Bombers sacrifices itself
9. Flame-Kin War Scout — When a Demon enters thanks to Boris Devilboon, Flame-Kin War Scout sacrifices itself
10. Monkey Cage — When a Demon enters thanks to Boris Devilboon, Monkey Cage sacrifices itself

120 other cards care about it too. These are the ones with the most connections.

anything is cast — 12,333 cards in Boris Devilboon's colors can cause this (Boris Devilboon is one).

When Boris Devilboon is cast:

1. Relic Amulet — puts a charge counter on itself
2. Rockslide Sorcerer — deals 1 damage

1 other card cares about it too. These are the ones with the most connections.