msem-instigator

Volcanic Catastrophe deals 3 damage to any target. If a permanent dealt damage this way would die this turn, instead exile it and its controller's graveyard.

You may play Volcanic Hollow from your graveyard as long as seven or more cards are in your graveyard.
Volcanic Hollow enters the battlefield tapped.
{T}: Add {U} or {R}.
Cycling {1}{U}{R} ({1}{U}{R}, Discard this card: Draw a card.)

Overcast — Whenever you cast a spell, create a 1/1 black Bird creature token with flying and menace if {C} was spent to cast it.
Whenever three or more creatures you control deal combat damage to a player, return target card from your graveyard to your hand.

{T}: Return target creature card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. That creature salvages a card. (Exile one from your graveyard until that creature leaves the battlefield. Whenever that creature deals combat damage to a player, put a card it salvaged into your hand.)

Each other creature you control that's a Merfolk or an Elemental gets +1/+1.
Whenever you cast an instant, sorcery, or Merfolk spell, you may pay {1}. If you do, create a 1/0 blue Elemental creature token.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
{3}{U}: Target creature gains slipstream until end of turn.

Pressure {3}{G} (You may cast this spell for its pressure cost if seven or more cards are in your graveyard.)
Put two +1/+1 counters on target creature you control if Way of the Danithra was cast for its pressure cost. Then it fights up to one target creature you don't control.

At the beginning of your end step, if you cast no spells this turn, untap target creature.

Menace (This creature can't be blocked except by two or more creatures.)
Whenever Weedy Whackers attacks, create a 1/1 green Insect creature token that's tapped and attacking.

Counter target spell if you have more cards in your graveyard than that spell's controller.

Whenever two or more creatures you control deal combat damage to a player, you lose 1 life and draw a card.

Return target card from your graveyard to your hand.
{1}{G}, Tap an untapped Shaman you control, Exile Whisper of the Wild from your graveyard: Return target card from your graveyard to your hand.

Wildrune Thicket enters the battlefield tapped unless you have two or more opponents.
{T}: Add {R} or {G}.

Destroy target artifact or enchantment.
Cycling {2} ({2}, Discard this card: Draw a card.)

Whenever you cast a Knight spell or an Adventure spell, Wimbledon's Squire gets +1/+1 until end of turn.

Create a 1/1 green and white Mouse Soldier creature token with vigilance and a 1/1 white and black Badger Cleric creature token with lifelink.

This spell costs {1} less to cast if you have more life than an opponent and {1} less to cast if you control a Cleric.
Deathtouch

At the beginning of your end step, if you cast no spells this turn, you may return Wrathful Meditant to its owner's hand.

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever two or more creatures you control deal combat damage to a player, add a quest counter.
1, 2 — Create a 2/1 black and red Cat Pirate creature token with menace.
3 — Create a colorless artifact token named Motherlode with “{T}: Add two mana of any one color” and “{3}, {T}, Discard your hand: Draw two cards.”
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Whenever you draw your second card each turn, put a +1/+1 counter on Youthful Tortoise.
Cycling {2} ({2}, Discard this card: Draw a card.)

Lifelink
Spells your opponents cast cost an additional {1} to cast for each spell they've cast before it this turn.