msem-instigator

Trample
When Contentious Yak enters, another target creature you control gets +1/+1 and gains trample until end of turn.

When Embrace Samang enters, put a charge counter on it for each color among permanents you control.
At the beginning of your first main phase, remove a charge counter from Embrace Samang. If you do, draw a card, then add one mana of any color.

Towering Inferno deals X damage to each creature without flying. If a creature you don't control dealt damage this way would die this turn, exile it instead.

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
At the beginning of your upkeep, create a token that's a copy of the enspirited card. It gains haste until end of turn. Exile it at the beginning of the next end step.

Target creature you control and each other creature with the same name as that creature get +3/+3 and gain trample until end of turn.

When Indomitable Duo enters, choose up to two creature card names.
Whenever Indomitable Duo attacks, put a +1/+1 counter on each creature you control with a name chosen by Indomitable Duo.

You may have Surging Wurm assign its combat damage as though it weren't blocked.
Surging Wurm gets +2/+2 as long as seven or more cards are in your graveyard.

Trial 6 (As you cast this spell, an opponent of your choice may pay 6 life. If they don't, they fail the trial.)
Flying
When Reckoner of Man enters, if the trial was failed, it deals 3 damage to each creature you don't control.

Flying
When Cerulean Sovereign enters, you may return target creature an opponent controls or instant or sorcery card in your graveyard to its owner's hand.

Create a 3/3 red Giant creature token with haste.
Creatures you control gain double strike until end of turn.

Motley — This spell costs {3} less to cast as long as there are five or more names among nonland permanents you control.
Destroy all creatures.

When Phantasmal Samaritan enters, you gain 4 life.

Whenever a player casts a spell from their hand, that player exiles it. Then they cast a copy of a card exiled with Embrace the Unpredictable chosen at random without paying its mana cost.

Whenever Power of Redemption attacks, choose one —
• Remove all -1/-1 counters from all creatures you control.
• Untap all creatures you control.

Trample
When Spawn of Qiyan enters, distribute four +1/+1 counters among any number of target creatures you control.
{2}{G}: Put Spawn of Qiyan from your graveyard into your library second from the top.

Whenever a Soldier or Knight you control enters, you may sacrifice Ceanne's Dawnbringer. If you do, put your choice of two different counters on that creature from among +1/+1, first strike, lifelink, and vigilance.

Flying
Tap three untapped Satrapies you control: You may cast target card from your graveyard. Pay life equal to its mana value rather than pay its mana cost. If that spell would be put into a graveyard, exile it instead.

Create two 1/1 green Frog creature tokens. (Then exile this card. You may cast the creature later from exile.)

Whim of Ifram deals 4 damage to target creature chosen at random.

When Lunar Pact enters, target creature attacks during its controller's next combat if able.
Players can't untap more than two nonbasic permanents during their untap step.

Prowess
Whenever you cast a noncreature spell, audition for blue or for red. (Create a 1/1 Construct Actor creature token, a Wizard Role giving 2/2 and prowess, a Warlock Role giving 2/1 and flying, or a Warrior Role giving 3/2 and trample. Roles replace older ones.)

Prevent all combat damage that would be dealt to Silent Reaver.
Prevent all combat damage Silent Reaver would deal to creatures.

Creatures you control get +1/+1 and gain first strike until end of turn.

Meteor Volley deals 3 damage to each creature.
Reprise {4}{R}{R} (As you cast an instant or sorcery spell, you may exile one card with reprise from your graveyard and pay its reprise cost. If you do, add its effects to that spell.)

Creatures you control get +1/+1 until end of turn. Enchantment creatures you control gain vigilance until end of turn.
Flashback {4}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)