msem-instigator

Enchant creature
Enchanted creature gets +2/+3 and has trample.

Trample
Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)

Flash

{T}: Add {C}.
{T}: Choose a color from among permanents you control. Add one mana of that color.

Flying
When Ghastly Spirit enters, mill four cards, then return a nonland card from your graveyard to your hand.

Until end of turn, target creature you control gains “When this creature dies, return it to the battlefield under your control with a +1/+1 counter on it.”

({T}: Add {R} or {G}.)
Glittering Grove enters tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

When Grim Botanist enters, create a 1/1 green Saproling creature token.
Whenever a nontoken creature you control dies, populate. (Create a token that's a copy of a creature token you control.)

Enchant creature
Enchanted creature has experience. (Whenever it attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)

Gruff Clutch enters with six +1/+1 counters on it.
{R}, Remove a +1/+1 counter from Gruff Clutch: It deals 1 damage to any target.

Flying
Each spell costs {2} more to cast except during its controller's turn.

No more than one creature can attack each combat.
No more than one creature can block each combat.

Whenever an artifact you control enters, look at the top card of your library. If that card's mana value is less than or equal to that artifact's mana value, you may reveal it and put that card into your hand. Otherwise, put it on the top or bottom of your library.

When Healing Center enters, you gain 2 life.
{T}: Add {C}.

At the beginning of your upkeep, if you have less life than an opponent, you lose 1 life and you draw a card.

Menace
{1}{B}{R}: Creatures you control get +1/+0 until end of turn.

When Hex Maniac enters, return target non-Human creature card from your graveyard to your hand.

Flash
When Hidden Sprout enters, put a +1/+1 counter on target creature.

Lifelink
Whenever you gain life, you may transform Hopeful Caretaker. If you don't, put a +1/+1 counter on it.

Double the power and toughness of target creature you control until end of turn. It doesn't untap during its controller's next untap step.

Enchant creature
Harness (You may tap a creature you control as you cast this spell. If you do, reduce this spell's mana cost by that creature's power.)
Enchanted creature doesn't untap during its controller's untap step.

Harness (You may tap a creature you control as you cast this spell. If you do, reduce this spell's mana cost by that creature's power.)
Search target opponent's library for a creature or planeswalker card and put it onto the battlefield under your control. That player shuffles.

Ice Path enters tapped.
As Ice Path enters, choose a color.
You may spend {C} as though it were mana of the chosen color.
{T}: Add {C}.

You may have Imaginative Dreamer enter as a copy of any creature on the battlefield. When it does, it stops being a copy.

Flying
Vanguard — Whenever a creature you control attacks alone, it gains first strike until end of turn.