msem-instigator

Haste
Whenever a player casts a spell, Rakkiri Dissident deals 1 damage to that player.

Flash
When Cane Dancer enters the battlefield, you may cast target blue instant or sorcery card with mana value 2 from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.

Stormsurge deals 3 damage to any target.
Orchestrate {R} (You may exile this card from your hand anytime you could cast a sorcery for its orchestrate cost. When you next resolve a spell, you may cast this from exile without paying its mana cost.)

Enchant creature
Enchanted creature has lifelink and gets +1/+1 for each color among permanents you control and cards in your graveyard.

Menace (This creature can't be blocked except by two or more creatures.)
Avatar of Basat can't block.

Each player sacrifices a creature.

Aetherize target creature you control. (To aetherize, create a token that's a copy of it, then exile that token.)
Draw a card.

Whenever you gain life, Clerics you control get +1/+1 and gain trample until end of turn.

Siempre que ganes vidas, los Clérigos que controlas obtienen +1/+1 y ganan la habilidad de arrollar hasta el final del turno.

Whenever Performer of Ambition attacks, each player discards a card. Then if a player has no cards in hand, you may transform Performer of Ambition.

The Urchin King's power and toughness are each equal to the number of cards in all graveyards.
Sacrifice a creature: The Urchin King gains lifelink and indestructible until end of turn.

Target creature gets +X/+0 until end of turn, where X is the number of instant and sorcery cards in your graveyard.

Archive 5 (As this enters the battlefield, shuffle the top five cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
You may play lands from the archived library.

Flying, haste
{X}{R}{R}, Exile an instant or sorcery card with mana value X from your graveyard: Return Merkurio's Familiar from your graveyard to the battlefield. It gets +X/+0 until end of turn.

Sacrifice a creature: Exile the top card of your library. Until end of turn, you may play that card.

When Nomadic Patriarch enters the battlefield, nourish 1. (To nourish 1, either put a +1/+1 counter on this creature or create a 1/1 white Citizen creature token.)
Remove a +1/+1 counter from Nomadic Patriarch: Put a +1/+1 counter on each other creature token you control.

{T}, Sacrifice a creature: Search your library for a creature card with mana value 1 and put it onto the battlefield. Then shuffle. Activate only as a sorcery.

{T}: Add {C}.
{2}, {T}: For each color among cards in your graveyard, add one mana of that color.

Trample, haste
Thriving Hydra enters the battlefield with four +1/+1 counters on it.
When Thriving Hydra enters the battlefield, for each other creature you control, put X +1/+1 counters on that creature, where X is four minus its power.
Whenever Thriving Hydra attacks, double the number of +1/+1 counters on each creature you control.

Whenever you cast a noncreature spell, create a 1/1 colorless Construct artifact creature token.

Menace
Jara Champion can only attack or block alone.
Whenever one or more players lose life for the first time each turn, put a +1/+1 counter on Jara Champion.

Choose a nonland card type. Target player reveals their hand. You choose a card of the chosen type from it. That player discards that card.

{U}, Put a travel counter on Endless Discoveries: Draw a card. This ability costs {1} more to activate for each travel counter on Endless Discoveries.
{3}{U}{U}, Sacrifice Endless Discoveries: Return target instant or sorcery card with mana value less than or equal to the number of travel counters on Endless Discoveries from your graveyard to your hand.

This spell can't be countered.
Draw a card for each different mana value among nonland permanents you control.

Target player mills two cards. You draw a card and you lose 1 life.
Leitmotif (If you cast this spell from your hand, exile it as it resolves. When you next cast a spell that shares a color with this card, you may cast this from exile without paying its mana cost.)