msem-instigator

Wither (This deals damage to creatures in the form of -1/-1 counters.)
When Abyssal Familiar dies, it deals 1 damage to you and to any target.

{T}: Add {C}.
{T}, Exile two cards from your graveyard: Add {B} or {R}.

Your starting life is 24.
{X}, Discard a card: Create a token that's a copy of a creature card with mana value X chosen at random. If X is 11 or greater, choose a creature with mana value X or greater instead. Activate only as a sorcery and only once each turn.

When Acolyte of Night dies, each opponent loses 1 life.

Choose two —
• Untap target nonland permanent.
• Target creature gets +2/+0 until end of turn.
• Target creature gains hexproof until end of turn.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Menagerie — If there are five or more creature types among creatures you control, creatures you control get +1/+1 until end of turn.

{T}, Sacrifice Adaptive Terrains: Search your library for a basic land card and put it onto the battlefield tapped, then shuffle.

At the beginning of your upkeep, if you control four or more Swamps, you may exile target creature card from your graveyard. If you do, create a tapped token that's a copy of it except it's a black Mummy.

{T}: Add one mana of any type that a land an opponent controls could produce.

Adjudicate, then Admonish the Unruly deals damage to target creature equal to the number of Auras you control. (Create a white Aura enchantment token with enchant creature and “Sacrifice this token: Untap enchanted creature” attached to target creature.)

Whenever you cast an Adventure spell, put a +1/+1 counter on Adventurer Extraordinaire.

{2}, Sacrifice Adventurer's Amulet: Search your library for a basic land or Satrapy card, reveal it, put it into your hand, then shuffle.

Look at the top three cards of your library. You may reveal a creature or land card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

{1}{W}: Aegis Champion gains indestructible until end of turn.

Flash
Enchant creature
When Aegis Expertise enters the battlefield, untap enchanted creature.
Enchanted creature gets +0/+3.

({T}: Add {U}.)
Aerie's Pillar enters the battlefield tapped.
Flying
{2}{U}{U}: Aerie's Pillar becomes a creature in addition to its other types until end of turn.

{T}, Sacrifice Aether Gateway: Create a tapped Plains token, Island token, Swamp token, Mountain token, or Forest token.

Whenever you make first contact, you may draw a card. If you do, put a card from your hand on the bottom of your library. (You make first contact the first time each turn you cast a spell with a name not in your graveyard or control already.)

Tap up to two target creatures.
Flashback {3}{W/U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Target player mills X cards, where X is two plus the number of cards named Against the Waves in your graveyard. Draw a card, then conjure three cards named Against the Waves and shuffle them into your main library.

Whenever a land enters the battlefield under your control, untap Ageless Wanderer.
{1}, {T}: Add one mana of any color.

Menace, trample, indestructible
Whenever Aghavaan Unleashed deals combat damage to a player, that player gets that many poison counters.
At the beginning of your end step, sacrifice another creature or transform Aghavaan Unleashed.

{T}: Add {C}.
At the beginning of each end step, if you control five or more Snake creatures, transform Aghavaan's Wound.

{T}, Discard a card: Add {C}.
Whenever you discard one or more cards, you may pay {2}. If you do, draw a card.

Rapport — Whenever Ainok Lout and at least one other creature you control become tapped, Ainok Lout gets +2/+0 until end of turn.