msem-instigator

Menace
Cat creatures you control have menace.
When Basat Priest enters, create a 2/2 white Cat creature token.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When Temple Instructor enters, return target creature to its owner's hand.

Double strike
Whenever you cast a noncreature spell, you may choose one that hasn't been chosen —
• Tap or untap target permanent.
• Draw two cards, then discard a card.
• Creatures you control get +1/+1 until end of turn.

Enchant creature
Whenever enchanted creature becomes tapped, Violent Repercussions deals 3 damage to that creature's controller.

You may reveal a legendary card you own from outside the game and put it into your hand. Exile Epic Encounter.

{T}: Add {C}.
Whenever Cunning Chanter becomes tapped, each opponent mills a card.

Whenever you tap a creature for mana, put a +1/+1 counter on that creature.
{T}: Add {G}.

Enchant creature
Enchanted creature gets +2/+2. Other creatures you control get +1/+1.

This creature can't be blocked.
{2}{U}, Sacrifice this creature: Tap target creature and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Reach
{G}, Sacrifice Rei's Watch: Untap all creatures you control.

Enchant permanent
When Tempted by Lotuses enters, enchanted permanent's owner creates three colorless artifact tokens named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”
You control enchanted permanent.

Flying
Whenever another creature enters, you gain 1 life.

Assault {X}{R}{R} (Whenever this attacks, if it has no +1/+1 counters on it, you may pay its assault cost to put a +1/+1 counter on it.)
Other Elementals you control get +1/+0.
When Unbound Annihilus assaults, create X 1/1 red Elemental creature tokens that are tapped and attacking.

If you control ten or more nonland permanents, you get an emblem with “At the beginning of your end step, return target permanent card from your graveyard to the battlefield.”
Destroy all nonland permanents.

When Vasille Rioters enters, conjure three cards named Vasille Rioters and shuffle them into your library, then you get a riot counter.
Vasille Rioters gets +1/+1 for each riot counter you have.

Flourishing Swamp enters tapped.
As Flourishing Swamp enters, choose a basic land type.
Flourishing Swamp is the chosen type in addition to its other types.

Flying
Sacrifice six Swamps: Return Berbarus Unsealed from your graveyard to the battlefield with an indestructible counter on it. You draw six cards and you lose 6 life.

Alpha (You may have this creature enter with a +1/+1 counter on it. If you do, it becomes alpha and can only attack alone.)
Brazen Chimera can't be blocked except by three or more creatures as long as it has a +1/+1 counter on it.

Unyielding Aswaran can't be blocked by Armies.

Reverberate {2}{G} (When you cast this spell, copy it if you paid its reverberate cost. The copy becomes a permanent when it resolves.)
Mystical Echo gets +1/+1 for each other Reflection you control.
Whenever you discard a card, Reflections you control gain trample until end of turn.

Torrid Path enters tapped unless you control one or fewer other lands.
{T}: Add {R} or {W}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Level experience (Whenever this creature attacks, if it has fewer than three level counters on it, put a level counter on it.)
When Copperhide Calf has three or more level counters on it, remove them all and transform it. [2/2]
[level 1-3] Prevent the first 1 damage that would be dealt to Copperhide Calf each turn. [3/3]

Whenever The Ever-Pestilent deals combat damage to a player, that player discards a card at random.

When Deadly Harpoon enters, destroy up to one target creature or planeswalker.
Equipped creature gets +2/+0.
Equip {2}

When Edina's Soulsinger enters, create a 1/1 blue Jellyfish enchantment creature token with slipstream. (It can't be blocked as long as only creatures with slipstream are attacking.)