msem-instigator

Target creature gets +X/+0 and gains trample until end of turn.

Enchant creature
Enchanted creature gets +2/+2.
Sacrifice Steady Reminiscence: Enchanted creature gains indestructible until end of turn.

Prowess
When Arcane Dredger enters, return target instant or sorcery card from your graveyard to your hand.

Horizon Wayfarer's power and toughness are each equal to the number of differently named lands you control.

When Wayward Bloodseeker enters, put a +1/+1 counter on up to one target creature you control. When you do, Wayward Bloodseeker deals damage to any target equal to the number of permanents you control with counters on them.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
{4}{B}{B}, {T}, Sacrifice Abalone Abomination: Create an X/X black Horror creature token, where X is the number of cards in your graveyard.

{T}: Add {C}.
{1}, {T}: Add {G}{W}.

At the beginning of each upkeep you may pay {W}. If you do, tap target creature.

Enchant creature
When Knight's Daring enters, put two +1/+1 counters on enchanted creature.
Whenever enchanted creature deals combat damage to a player, put a +1/+1 counter on each creature you control with a +1/+1 counter on it.

Engorge (As this enters, mill three cards, then exile a card from among the milled cards.)
When Scourge of the Deadlands enters, if it engorged a creature card, each other player sacrifices a creature.

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)
Whenever you gain life, you may pay {W}. If you do, transform Evigian Noble.

Concord — Temple Attendant gets +1/+1 and has indestructible as long as there are four or more card types among permanents you control.

Flying
{B}, Sacrifice another creature: Draw a card.

Flying, vigilance

Tap up to two target creatures. They don't untap during their controller's next untap step.
Reprise {3}{U} (As you cast an instant or sorcery spell, you may exile one card with reprise from your graveyard and pay its reprise cost. If you do, add its effects to that spell.)

When Peeto enters, scry 2.
Whenever a Scout you control attacks, choose land or nonland, then look at the top card of your library. If it's a card of the chosen kind, you may reveal it and draw a card.

Enchant creature
You control enchanted creature.
When Shahmaran's Captivation enters, untap enchanted creature. It gains haste until end of turn.

Until end of turn, target creature you control gains “{T}: Destroy target creature.”

{1}{W}: Artifact creatures you control get +1/+1 until end of turn. Activate only once each turn.

Hexproof
Rapport — Whenever Depths Stalker and at least one other creature you control become tapped, Depths Stalker gets +1/+0 until end of turn and can't be blocked this turn.

Skylight Fortress enters tapped.
When Skylight Fortress enters, you may search your library for a card named Skylight Fortress, reveal it, put it into your hand, then shuffle.
{T}: Add {C}.

Target opponent looks at the top six cards of your library and separates them into a face-down pile and a face-up pile. Choose a pile, then play any number of cards from it without paying their mana costs. Put the rest of the cards into your graveyard.

Flying
Whenever you attack, create two 1/1 white Human creature tokens that are tapped and attacking. Creatures you control get +1/+1 until end of turn.
Fleeting {2}{W}{W} (You may cast this spell for its fleeting cost. If you do, sacrifice it at the beginning of the next end step.)

When Uncovered Mine enters and at the beginning of your upkeep, return a random card from your graveyard to your hand.

Target creature can't block this turn.
Draw a card.