msem-instigator

When Battlemage's Disruption enters, you may return target creature to its owner's hand.
{3}{U}, Sacrifice Battlemage's Disruption: Return target creature to its owner's hand.

Whenever one or more creatures you control attack, you may put a progress counter on Battlesuit Prototyping.
[progress 2-6] Creatures you control get +1/+1.
[progress 7+] Creatures you control get +2/+2 and have indestructible.
Creatures you control get +2/+2 and have indestructible.

Target creature you control fights target creature you don't control.

{2}{G}: Target face-down creature you control becomes a Beast with base power and toughness 5/5 until end of turn.

Damage can't be prevented this turn. Beat & Batter deals 2 damage to target player, then 2 damage to each player that's gained life this turn.

Sabotage — Whenever an opponent or permanent an opponent controls becomes the target of a spell you control, put a quest counter on Beckon Darkness.
At the beginning of your upkeep, if Beckon Darkness has four or more quest counters on it, return target creature card from your graveyard to the battlefield.

Bloodprice {2}{B}{B} (You may cast this card by sacrificing a creature and paying its bloodprice.)
Return target creature card from your graveyard to your hand. If you cast this spell for its bloodprice, return that card to the battlefield instead.

Draw a card, then reveal any number of creature or land cards from your hand. You gain that much life.

Enchant creature
Enchanted creature has base power and toughness 1/1 and is a Frog in addition to its other types.
When enchanted creature deals damage to a player, sacrifice Belittle.

When Bellani Mystic enters, target player mills two cards.

Flying
Belmord can't block.
{1}{B}: Create a 1/1 black Bat creature token with flying and “This creature can't block.” Activate only if a player gained or lost life this turn and only once each turn.

{T}: Until end of turn, target land is every basic land type in addition to its other types and its name becomes Morphic Sea.

Armed — Beragnian Savage gets +1/+0 and has first strike as long as it's equipped.

When Bestower of Blooms dies, create an X/X green Plant Knight creature token, where X is Bestower of Blooms's power.

Enchant Equipment
You control enchanted Equipment.

Enchant two nonland permanents you control
Once each turn, when you activate an ability of one of the enchanted permanents, you may put a +1/+1 counter, a loyalty counter, or a charge counter on each enchanted permanent. (They can be different counters.)

As an additional cost to cast this spell, remove X +1/+1 counters from among creatures you control.
Create X 2/2 green Wolf creature tokens.

When Bezoarbeast dies, each opponent loses 2 life and you create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

Whenever you cast a noncreature spell, target player mills two cards.
{U}: This creature gets +1/-1 until end of turn.

Until end of turn, cards in graveyards lose all names, card types, and abilities.
Draw a card.

(Add a quest counter as this enters. Sacrifice after 4.)
Whenever a creature you control enters, add a quest counter.
1 — Exile target nonland permanent an opponent controls until target creature you control leaves the battlefield.
2, 3 — Each player may scry 1.
4 — Put all cards exiled with Bind the Great Evil into their owners' graveyards.

Enchant creature
Enchanted creature can't attack or block alone.

{T}: Add one mana of any color a basic land you control could produce.

Menace
When Bit Player dies, it deals 1 damage to each opponent.

Destroy target creature with flying.