msem-instigator

Whenever you cast a spell that doesn't share a color with Pond Tenders, you may put target card from your graveyard on the bottom of your library.

When Possibility Engine enters, exile the top two cards of your library.
Wanderlust — During each of your turns, if you control four or more differently named lands, you may play a card exiled with Possibility Engine.

Spells cost {3} more to cast this turn.
Activated abilities that aren't mana abilities cost {3} more to activate this turn.

Target creature gets +1/+1 until end of turn. When that creature dies this turn, create a 2/2 colorless Spirit creature token.
Inscribe {3}{G} ({3}{G}: Exile this card from your hand inscribed on a creature you control. Whenever that creature attacks, its controller may cast a copy of the inscribed card without paying its mana cost. Inscribe only as a sorcery.)

Vanishing 3
Whenever a time counter is removed from Prayers of Judgement, each player loses 1 life and mills two cards.

Vanishing 5 (This permanent enters with five time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Players play with the top card of their libraries revealed.
Whenever a time counter is removed from Precarious Ledgers, you may have target player mill a card.

{1}, {T}: Add one mana of any color.
Crew 1 (Tap any number of creatures you control with total power 1 or greater: This Vehicle becomes an artifact creature until end of turn.)

Enchant creature
You choose whether enchanted creature attacks each combat rather than its controller (after its controller chooses which of their other creatures attack. That player still chooses the player or planeswalker it attacks.)

Scry 3.
Catalyze. (The next spell you cast this turn costs {1} less to cast.)

Put a +1/+1 counter on target creature.
Draw a card.

Target creature you control fights target creature you don't control. (Each deals damage equal to its power to the other.)

As an additional cost to cast this spell, pay {2} or reveal an instant or sorcery card from your hand.

Enchant land
Enchanted land has “{T}: Add {G}{G}.”

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever Primal Ruffian attacks, if it has a +1/+1 counter on it, other creatures you control get +1/+1 until end of turn. (If it had no counters on it when it attacked, this ability does not trigger.)

{U}: Primordial Manifestation gets +1/-1 until end of turn.
Whenever Primordial Manifestation deals combat damage to a player, draw a card.

Target creature you control gets +2/+0 and gains indestructible until end of turn. You lose 2 life.

Flash
When Priority Paradigm enters, conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)
The first sorcery spell you cast each turn has flash.

Whenever you cast a spell, you gain 1 life for each of its colors other than white.

{T}, Tap an untapped creature you control: Add one mana of any color.

Defender
Whenever you cast an enchantment, instant, or sorcery spell, scry 1 if it's the first time this ability has resolved this turn. If it's the second time, Prismscale Piranhas can attack this turn as though it didn't have defender. If it's the third time, whenever Prismscale Piranhas deals combat damage to a player this turn, draw a card.

Surveil 1, then draw a card. You lose 1 life.
Flashback—{B}, Sacrifice a creature. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Target creature gains indestructible until end of turn. You gain 4 life.
Prophecy {G} (Once each turn, you may exile a card with prophecy as you reveal it. When you do, you may cast it for its prophecy cost as long as it's exiled.)

Flash
Flying
Prodigious Panya has base power and toughness 4/4 during extra turns.

Whenever Professor's Assistant becomes tapped, add {R}. Until end of turn, you don't lose this mana as steps and phases end.

Target player reveals their hand. You choose a nonland card from it. That player discards that card.
Conjure a card named Fatigue and put it on top of your library. (It's a colorless sorcery that costs {2} with “Draw a card.”)