msem-instigator

Flash
When Master of Disorientation enters, you may choose new targets for target instant or sorcery spell. Then proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

First strike (This creature deals combat damage before creatures without first strike.)
Other Soldier creatures you control get +1/+1 and have first strike.
{3}{W}: Create a 1/1 white Soldier creature token.

Whenever a non-Spirit creature deals combat damage to a player, destroy that creature. Its controller creates a 1/1 colorless Spirit creature token.

Enchant creature
Whenever enchanted creature deals combat damage to a player, draw a card.

Flash
When Cocky Bladesinger enters, it gains first strike, lifelink, and haste until end of turn.

This spell costs {X} less to cast, where X is half the number of creatures on the battlefield, rounded down.
Destroy all creatures.

When Thunderwhirl Dancer enters, it gets +X/+X until end of turn, where X is the number of +1/+1 counters among creatures you control. Then it fights up to one target creature.

Deploy 2 (As this enters, you may tap any number of other creatures you control with total power 2 or more.)
When Rogue Groundskeeper enters deployed, exile up to two target cards from a single graveyard.

This spell costs {1} less to cast for each Desert you control.
When Crested Crustacean enters, return target permanent to its owner's hand.

Deathtouch
Whenever a creature an opponent owns dies, exile the top two cards of that player's library face down. For as long as those cards remain exiled, you may look at them, you may cast them, and you may spend mana as though it were mana of any type to cast them.

Counter target spell.
Surveil 1.

[+1]: Create a 1/1 green Merfolk creature token.
[0]: Target artifact or creature loses all abilities and becomes a green Seal creature with base power and toughness 3/3.
[–6]: Up to five target noncreature permanents lose all abilities and become green Merfolk creatures with base power and toughness 1/1.

Defender
Wanderlust — As long as you control four or more differently named lands, Zhedina Servitor can attack as though it didn't have defender.

Equipped creature gets +1/+1.
Whenever equipped creature deals combat damage to a player, Ornamental Longbow deals 1 damage to any target.
Equip {2}

Exile target creature or enchantment. You gain 3 life.

Gain control of target creature until end of turn. Untap that creature. It gains haste and is marked until end of turn.

Hexproof
Discard two cards: You may cast target instant or sorcery card in your graveyard this turn. If that spell would be put into a graveyard, exile it instead.
At the beginning of your end step, if you have two or fewer cards in hand, transform Fahrib.

Vigilance, lifelink

Legacy (You may play this side of this card only from your graveyard. Exile it if it would leave the battlefield or not resolve.)
Whenever a Warrior you control becomes the target of a spell or ability an opponent controls, that player loses 1 life and discards a card, then you draw a card and gain 1 life.

Whenever you cast a cryptic spell, create a 1/1 white Human creature token with lifelink. (Artifacts, enchantments, and modal spells are cryptic.)

Civilized — Hard-Working Oxen gets +3/+0 as long as you control an artifact, a creature, and an enchantment.

Distribute two +1/+1 counters among one or two target creatures.

Flying
Whenever another creature you control enters, Adavene, Dean of the Arts deals 1 damage to each opponent.
Whenever a creature you control deals combat damage to a player, you may exile it, then return it to the battlefield.

First strike
Other creatures you control have protection from mana value 3 or greater.

Rattlecage Terror enters tapped.
{1}{B}: Return Rattlecage Terror from your graveyard to your hand. When you do, another target creature card with mana value 3 or less in your graveyard gains this activated ability until end of turn, except it costs {1} more to activate.