mtg.wtf

When Biomathematician enters the battlefield, create a 0/0 green and blue Fractal creature token. Put a +1/+1 counter on each Fractal you control.

Devoid
When Birthing Hulk enters the battlefield, create two 1/1 colorless Eldrazi Scion creature tokens. They have "Sacrifice this creature: Add {C}."
{1}{C}: Regenerate Birthing Hulk.

When Bishop of Binding enters the battlefield, exile target creature an opponent controls until Bishop of Binding leaves the battlefield.
Whenever Bishop of Binding attacks, target Vampire gets +X/+X until end of turn, where X is the power of the exiled card.

When Bishop of the Bloodstained enters the battlefield, target opponent loses 1 life for each Vampire you control.

Enchant creature
When Bitter Chill enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
When Bitter Chill is put into a graveyard from the battlefield, you may pay {1}. If you do, scry 1, then draw a card.

When Bitter Reunion enters the battlefield, you may discard a card. If you do, draw two cards.
{1}, Sacrifice Bitter Reunion: Creatures you control gain haste until end of turn.

Flying
Acid Breath — When Black Dragon enters the battlefield, target creature an opponent controls gets -3/-3 until end of turn.

Flash
When Blacklance Paragon enters the battlefield, target Knight gains deathtouch and lifelink until end of turn.

Spectacle {2}{B}
When Blade Juggler enters the battlefield, it deals 1 damage to you and you draw a card.

When Blade Splicer enters the battlefield, create a 3/3 colorless Phyrexian Golem artifact creature token.
Golems you control have first strike.

Metalcraft — When Blade-Tribe Berserkers enters the battlefield, if you control three or more artifacts, Blade-Tribe Berserkers gets +3/+3 and gains haste until end of turn.

When Bladecoil Serpent enters the battlefield, for each {U}{U} spent to cast it, draw a card.
When Bladecoil Serpent enters the battlefield, for each {B}{B} spent to cast it, each opponent discards a card.
When Bladecoil Serpent enters the battlefield, for each {R}{R} spent to cast it, it gets +1/+0 and gains trample and haste until end of turn.

Flash
When Bladed Battle-Fan enters the battlefield, attach it to target creature you control. That creature gains indestructible until end of turn.
Equipped creature gets +1/+0.
Equip {1}

Flying
When Bladewing the Risen enters the battlefield, you may return target Dragon permanent card from your graveyard to the battlefield.
{B}{R}: Dragon creatures get +1/+1 until end of turn.

When Blanchwood Prowler enters the battlefield, mill three cards. You may put a land card from among the cards milled this way into your hand. If you don't, put a +1/+1 counter on Blanchwood Prowler.

Metalcraft — When Bleak Coven Vampires enters the battlefield, if you control three or more artifacts, target player loses 4 life and you gain 4 life.

When Blight-Breath Catoblepas enters the battlefield, target creature an opponent controls gets -X/-X until end of turn, where X is your devotion to black.

Enchant land
When Blighted Burgeoning enters the battlefield, incubate 2.
Whenever enchanted land is tapped for mana, its controller adds an additional one mana of any color.

Flying
Haunt
When Blind Hunter enters the battlefield or the creature it haunts dies, target player loses 2 life and you gain 2 life.

When Blister Beetle enters the battlefield, target creature gets -1/-1 until end of turn.

When Blisterstick Shaman enters the battlefield, it deals 1 damage to any target.

Flash
When Blitz Leech enters the battlefield, target creature an opponent controls gets -2/-2 until end of turn. Remove all counters from that creature.

Flash
Flying
When Blizzard Strix enters the battlefield, if you control another snow permanent, exile target permanent other than Blizzard Strix. Return that card to the battlefield under its owner's control at the beginning of the next end step.

When Blood Fountain enters the battlefield, create a Blood token.
{3}{B}, {T}, Sacrifice Blood Fountain: Return up to two target creature cards from your graveyard to your hand.

Lifelink
When Blood Operative enters the battlefield, you may exile target card from a graveyard.
Whenever you surveil, if Blood Operative is in your graveyard, you may pay 3 life. If you do, return Blood Operative to your hand.