msem-instigator

Defender
Whenever another player casts an instant or sorcery spell, Devouring Spellroot gets +2/+2 until end of turn.

Shimmer (Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the end step.)
When Colpah Mystic enters, you may discard a card. If you do, creatures you control named Colpah Mystic get +2/+2 until end of turn.

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

When Churning Spellroot enters, create three 1/1 black Worm creature tokens.

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)
{1}{G}: Untap Chantwood Guards.

Other Shaman creatures you control get +1/+0.
Revive {4}{G}{G} ({4}{G}{G}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

When Chantwood Channeler enters from your graveyard, it gains haste and creatures you control get +3/+3 and gain trample until end of turn.
{5}{G}{G}{G}, Sacrifice a creature: Return Chantwood Channeler from your graveyard to the battlefield. Activate only as a sorcery.

Hexproof
Whenever attackers are declared, the active player may pay {2} for each creature attacking you. Then you may have Bridge Kalak become an X/X Troll creature until end of turn, where X is the number of times that player didn't pay mana this way.

Trample
Revive {5}{B} ({5}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Counter target instant or Aura spell that targets a permanent you control.

Revive {3}{G} ({3}{G}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

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

X target creatures can't block this turn.
Fuse (You may cast one or both halves of this card from your hand.)

Noncreature permanents you control become 2/2 red creatures in addition to their other types until end of turn.
Fuse (You may cast one or both halves of this card from your hand.)

Whenever Zana, the Dreamer attacks, you may pay {3}{R}{R}. If you do, for each attacking nontoken creature you control, create a tapped and attacking token that's a copy of it, except the tokens aren't legendary. Exile those tokens at the beginning of the end step.

[0]: Creatures you control gain haste until end of turn. Whenever a creature attacks this turn, put a loyalty counter on The Warrior Within.
[–1]: Exile the bottom two cards of your library. You may play one of them this turn.
[–6]: Untap each creature that attacked this turn. After this main phase, there is an additional combat phase.

At the beginning of combat, each player chooses a creature. Those creatures attack or block this turn if able. Whenever one of those creatures dies this turn, Sweep Stakes deals 3 damage to that creature's controller.

Haste
Storm Entity enters with a +1/+1 counter on it for each other spell cast this turn.

Haste
Shimmer (Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the end step.)

Return up to one target artifact card from your graveyard to your hand.
Put the bottom card of your library into your hand.

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

Whenever Practical Battlemage attacks, catalyze. (The next spell you cast this turn costs {1} less to cast.)

Whenever Ore Tunneler deals damage to an opponent, tap target land they control. It doesn't untap during its controller's next untap step.

Shimmer (Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the end step.)
Whenever you cast an instant or sorcery spell, Noirohpo Renegade gets +1/+0 until end of turn.