msem-instigator

Whenever a creature you control dies, put a +1/+1 counter on AOSE Xenocultivator. If this is the third time this ability resolved this turn, AOSE Xenocultivator deals 3 damage to any target.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
{4}{B}{B}, {T}, Sacrifice Abalone Abomination: Create an X/X black Horror creature token, where X is the number of cards in your graveyard.

Whenever a creature enters the battlefield, return each other creature controlled by the same player to its owner's hand.

Abandoned Battlefield enters the battlefield tapped if you control another nonbasic land.
{T}: Add {U} or {B}.

Abandoned Cairn enters the battlefield tapped if you control another nonbasic land.
{T}: Add {B} or {R}.

Abandoned Chamber enters the battlefield with X story counters on it.
{3}, {T}, Remove all story counters from Abandoned Chamber and exile it: Return a card from your graveyard to your hand for each counter removed this way.

Abandoned Den enters the battlefield tapped.
{T}: Add {B}.
{B}, {T}: Target player loses 1 life. Activate only as a sorcery and only if you control a black creature.

Abandoned Forge enters the battlefield tapped if you control another nonbasic land.
{T}: Add {R} or {W}.

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)

Abandoned Hideout enters the battlefield tapped if you control another nonbasic land.
{T}: Add {U} or {R}.

Abandoned Laboratory enters the battlefield tapped if you control another nonbasic land.
{T}: Add {W} or {B}.

Abandoned Meadow enters the battlefield tapped if you control another nonbasic land.
{T}: Add {R} or {G}.

Nonland permanents have “This permanent doesn't untap during your untap step” and “{2}: Untap this permanent.”

{T}: Add one mana of any color. If you control another nonbasic land, Abandoned Monument doesn't untap at the beginning of your next untap step.

Abandoned Preserve enters the battlefield tapped if you control another nonbasic land.
{T}: Add {B} or {G}.

{T}: Add {C}.
{3}, {T}, Sacrifice Abandoned Sanctuary: Search your library for a land card with a basic land type and put it onto the battlefield tapped, then shuffle.

Abandoned Shores enters the battlefield tapped if you control another nonbasic land.
{T}: Add {G} or {U}.

Abandoned Skyroad enters the battlefield tapped if you control another nonbasic land.
{T}: Add {W} or {U}.

Abandoned Wilderness enters the battlefield tapped if you control another nonbasic land.
{T}: Add {G} or {W}.

When Abberant Frostbringer enters the battlefield, tap up to one target creature. If you do, put two stun counters on that creature. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Skip your draw step.
Your maximum hand size is equal to Abhorrent Academic's power.
At the beginning of your upkeep, if you have fewer cards in your hand than your maximum hand size, draw cards equal to the difference.

At the beginning of your end step, if you're horrific, you draw a card and you lose life equal to the number of cards in your hand. (You're horrific as long as you've sacrificed a permanent or discarded a card this turn.)

Engorge (As this enters the battlefield, mill three cards, then exile a card from among the milled cards.)
When Abhorrent Exhumer enters the battlefield, if it engorged a creature card, you may return target creature card from your graveyard to your hand.

Creature tokens you control have hexproof.
{3}{G}: Put a +1/+1 counter on target creature token.

Legendary spells you cast have nonlegendary cascade. (When you cast that spell, exile cards from the top of your library until you exile a nonlegendary nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)