msem-instigator

{G}: Exile target card from a graveyard. You gain 1 life and Purging Watchkeeper gets +1/+1 until end of turn.

Target creature becomes the color or colors of your choice until end of turn.
Draw a card.

Equipped creature has “Whenever this creature attacks, untap each other creature you control.”
Equip {3}

Whenever you cast a spell that doesn't share a color with Raloran Adept, you may switch target creature's power and toughness until end of turn.

Equipped creature is a Flagbearer in addition to its other types.
While an opponent is choosing targets as part of casting a spell they control or activating an ability they control, that player must choose at least one Flagbearer on the battlefield if able.
Equip {5}

As an additional cost to cast this spell, sacrifice a creature.
Look at the top X cards of your library, where X is the sacrificed creature's power. Put one of those cards into your hand and the rest into your graveyard.

Reveal the top five cards of your library. You may put a creature or Equipment card revealed this way into your hand. Then put the rest on the bottom of your library in any order.

Other creatures you control get +0/+1.
{T}: Add {G}.

Whenever a creature you control perseveres this turn, you gain 3 life. (A creature perseveres when it survives damage.)

Target player sacrifices an attacking creature. You gain life equal to that creature's power.

Enchant permanent
Whenever a counter is removed from enchanted permanent, you may put a counter of that type on another target permanent.

Enchant creature
Enchanted creature and other Soldier creatures you control get +1/+1.
Whenever enchanted creature attacks, you may tap or untap target creature you don't control.

Primal {1}{W}{W} (During your turn, you may cast this spell for {1}{W}{W} instead of playing a land.)
Return target creature card from your graveyard to the battlefield.

As an additional cost to cast this spell, discard a land card.
Draw two cards.

{T}, Sacrifice Rickety Guildhall: Search your library for a Forest or Island card and put it onto the battlefield tapped, then shuffle.

Whenever you cast a nonblue spell, create a 1/0 blue Horse Nymph creature token.
Horses get +1/+1 and have flying.

Primal {R} (During your turn, you may cast this spell for {R} instead of playing a land.)
Target creature gets +4/+0 and gains trample until end of turn.

Enchant creature
Enchanted creature has “At the beginning of each player's end step, that player chooses another creature they control. That creature fights enchanted creature.”

First strike
Engage (This creature must be blocked each combat if able.)

Vanishing 3 (This permanent enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
When the last time counter is removed from Rising Riots, destroy target land.

River's Wrath deals 2 damage to any target. If you've been dealt damage this turn, River's Wrath deals 4 damage instead.

When Rotting Sunseeker dies, return target creature card with power 2 or less from your graveyard to your hand.

{T}: Add {B} or {G}. You lose 1 life.

{T}, Sacrifice Ruined Citadel: Search your library for a Mountain or Plains card and put it onto the battlefield tapped, then shuffle.

Enchant creature
Enchanted creature gets +3/+0 and has menace.
Whenever enchanted creature deals combat damage to a player, discard a card, then draw a card.