msem-instigator

{1}, Sacrifice Gasoline Canister: It deals 1 damage to any target. If a creature or planeswalker dealt damage this way would die this turn, exile it instead.

Reach
Each other creature you control gets +1/+1 for each +1/+1 counter on it.

Choose two nonland permanent types. Exile each permanent that's at least one of the chosen types.
Flashback {8}{W}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Colorless creatures you control have “{T}: Add {C}.”

Target player sacrifices a creature. Then you gain 3 life if that player doesn't control any creatures.

Flying, haste
Whenever Rhyolithic Hellkite attacks, you may sacrifice a land or exile a land card from your graveyard. If you do, put a +1/+1 counter on Rhyolithic Hellkite.

At the beginning of each end step, you gain X life and each opponent loses X life, where X is the number of times you gained life this turn.
{2}{B}: Darksand Acolyte gains indestructible and lifelink until end of turn.

Enchant opponent
Whenever Middleware or another Curse becomes attached to enchanted player, exile the top card of that player's library face down. For as long as that card remains exiled, you may look at it and you may play it. Mana of any type can be spent to cast that spell.

Aleud Scorn deals 3 damage to target creature.
At the beginning of your upkeep, you may exile Aleud Scorn from your graveyard. If you do, add {R}{R}.

When Halskrow Street Scavenger enters, if a creature died under your control this turn, create a 2/2 green Wolf creature token.

Inferno Lash deals 2 damage to target creature or planeswalker. When it does, torment that permanent's controller. (They lose 3 life unless they discard a card or sacrifice a nonland permanent.)

Vigilance
Whenever Disgruntled Student deals combat damage to a player, scry 2.

Enchant creature
When Valorous Ideal enters, target creature can't block this turn.
Enchanted creature gets +2/+0 and attacks each combat if able.
When Valorous Ideal is put into a graveyard from the battlefield, return Valorous Ideal to its owner's hand.

Trample
Waste Grazer can't attack unless you've descended this turn. (You descended if a permanent card was put into your graveyard from anywhere this turn.)

Kicker {4}{U}{U} (You may pay an additional {4}{U}{U} as you cast this spell.)
Return target nonland permanent to its owner's hand. If this spell was kicked, create an 8/8 blue Kraken creature token with trample.

Creatures can't attack you unless their controller pays {2} for each of those creatures.
At the beginning of each opponent's end step, if you didn't lose life this turn, you get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)

Prowess
Whenever Hethwyr Warcaster or another Wizard you control enters, you may draw a card.

You may put a green creature card from your hand onto the battlefield. If you do, it fights target creature you don't control.

At the beginning of combat on your turn, gain control of target creature an opponent controls with power less than the greatest power among creatures you control until end of turn. Untap that creature. It gains haste until end of turn.

Creature spells you cast with power 4 or greater cost {1} less to cast.

Hexproof from spells cast from a graveyard
If a creature you control would die and that creature was the target of an instant or sorcery spell this turn, you may put it on top of its owner's library instead.

Flying
When Trove Tyrant enters, exile the top five cards of your library.
Whenever Trove Tyrant deals combat damage to a player, you may cast an artifact card exiled with it without paying its mana cost.

Flying
When Arcanum Owl enters, you may return target instant or sorcery card from your graveyard to your hand.