msem-instigator

Creatures you don't control get -3/-0 until end of turn. Those creatures don't untap during their controller's next untap step.

Return target creature to its owner's hand. You may have another target creature gain flying until end of turn.

[+1]: Creatures you control get +0/+1 until your next upkeep. Untap those creatures.
[–2]: Put target tapped creature into its owner's library third from the top.
[–7]: You get an emblem with “Whenever a nonland permanent you control is put into a graveyard from the battlefield, each opponent sacrifices a nonland permanent.”

First strike
When Gavis's Dragoons enters the battlefield, exile another target creature until Gavis's Dragoons leaves the battlefield.
Spells with the same name as the exiled card can't be cast (as long as this creature is on the battlefield.)

When Goblin Cutpurses enters the battlefield, target player discards a card, then draws a card.

First strike (This creature deals combat damage before creatures without first strike.)

{W}, {T}: Tap target creature.

When Goldhill Guardian enters the battlefield, choose a creature type.
Goldhill Guardian has protection from creatures of the chosen type. (It can't be blocked, targeted or dealt damage by creatures of the chosen type.)

Defender (This creature can't attack.)
Flying (This creature can't be blocked except by creatures with flying or reach.)
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
When Grave Revenant enters the battlefield, target opponent loses life equal to the number of creature cards in your graveyard.

The next 2 damage that a source of your choice would deal to you and/or permanents you control this turn is dealt to any target instead.

Flying
Harrier's Falcon can't attack or block alone.

Enchant land
Whenever enchanted land is tapped for mana, its controller adds one mana of any color.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever another noncreature source deals damage to a creature or player, you may have Hav'za, Itavan Warchief deal half that damage, rounded up, to any target.

You gain 5 life, then you may regenerate target creature. (The next time this would be destroyed this turn, it isn't. Instead tap it.)

Enchant creature
Enchanted creature has flying and can only block creatures with flying.

Whenever a creature you control dies, put a soul counter on Hill of Souls.
{T}: Add {C}.
{T}, Remove a soul counter from Hill of Souls: Add one mana of any color.

Flying
When Illusionary Steed becomes the target of a spell or ability, sacrifice it.

Enchant creature
Enchanted creature has “Whenever this creature attacks, if there are at least two other attacking creatures, this creature gains +2/+2 until end of turn.”

Enchant creature
Enchanted creature has “{R}, {T}: Create an X/1 red Elemental creature token with haste and trample, where X is this creature's power. Exile that token at the beginning of the next end step.”

Haste
When Inferno Forerunner enters the battlefield, you may have target creature gain haste until end of turn.

When Ironsmash Wrecker enters the battlefield, you may destroy target artifact.

Haste (This creature can attack and {T} as soon as it comes under your control.)

First strike (This creature deals combat damage before creatures without first strike.)
Whenever a creature you control becomes blocked by a creature, Itava Scourge deals 1 damage to that creature's controller.