msem-instigator

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.”)

Bigroot Valley enters the battlefield tapped.
{T}: Add {R} or {G}.
{1}, {T}: Add one mana of any color.

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 enters the battlefield under your control, add a quest counter.
1, 2 — Exile target nonland permanent an opponent controls until target creature you control leaves the battlefield.
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.

When Bio-Sequencer enters the battlefield, conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)
{1}, {T}, Sacrifice Bio-Sequencer: Add one mana of any color.

Put a +1/+1 counter on each of up to X target creatures.
Augmented — If you've spent {W}{U}{B}{R}{G} to cast spells this turn, instead put three +1/+1 counters on each of those creatures. They gain trample until end of turn.

{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.

Target opponent reveals their hand. You choose an instant or sorcery card from it or a card from their graveyard. Exile that card.

Deathtouch
{B}, Pay 1 life: Add one mana of any color. Activate this ability only once each turn.

When Blackwall's Edge enters the battlefield, if you control four or more lands, you may have each player conjure a card named Data-Point into their hand. (It's a sorcery that costs {2} with “Draw a card.”)
{T}: Add {C}.
When Blackwall's Edge is destroyed, return it to its owner's hand.

{1}{R/W}: Untap Blade of the Long Night.

Poisonous 1 (Whenever this creature deals combat damage to a player, that player gets a poison counter.)
Blade of the Serpent gets +1/+1 as long as an opponent is poisoned.

Equipped creature gets +2/+0.
Equip {1}

If a player would mill one or more cards, they mill that many cards plus two instead.

Target creature gets +2/+2 and gains menace until end of turn.

Blazing Volley deals 1 damage to each creature your opponents control.

({T}: Add {U}, {B}, or {R}.)
Bleak Dominion enters the battlefield tapped.

Bleak Shoreline enters the battlefield tapped unless you control an Island.
{T}: Add {W} or {B}.

Bleakrealm Moor enters the battlefield tapped unless you played it from exile.
{T}: Add {B} or {R}.

Enchant land
Whenever enchanted land is tapped for mana, its controller adds two mana in any combination of colors (in addition to the mana the land produces.)