msem-instigator

{1}: Look at the top card of your library.
{G}, {T}, Mill a card: Untap another target creature.

Flash
When Emissary of Dark Tides enters, you may return target noncreature spell or tapped creature to its owner's hand.

Flying
Whenever Entali Aeromancer attacks, Elementals you control gain flying until end of turn.

Whenever you cast an instant or sorcery spell, upgrade Error Exploiter. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying
• Hexproof

Spells you cast from anywhere other than your hand can't be countered.
Whenever an opponent casts a spell with the same name as a card they own in exile or in their graveyard, you may draw a card.

Infiltrate (Whenever one or more attacking creatures you control aren't blocked, this creature gets +1/+1 until end of turn.)
When Exile's Vanguard enters, tap target creature. That creature doesn't untap during its controller's next untap step.

When Fletcher Kalku enters or attacks, you may exile a card from your hand face down. If you do, draw a card.
You may look at cards exiled with Fletcher Kalku.
{U}{U}, Reveal a card exiled with Fletcher Kalku: Counter target spell if it has the same mana value as the revealed card. Then put the exiled card into its owner's hand.

Heroic — Whenever you cast a spell that targets Floodspeaker Triton, put a +1/+1 counter on Floodspeaker Triton, then scry 1.

Once each turn, when you activate a nonmana ability, you may tap target creature.
{1}{U}: Foggy Town Militia gains flying until end of turn.

When Fretport Bounty Hunter enters, scry 1.

Flying
Artifact spells you cast cost {1} less to cast.

Harmony — Target creature gains flying until end of turn.
When Glamorous Aerialist enters, harmonize. (Trigger up to one harmony of one permanent you control.)

Flying
Whenever Havengul Banshee attacks, each creature defending player controls gets -1/-0 until end of turn.
{3}{U}: Return Havengul Banshee from your graveyard to the battlefield transformed under your control attached to target opponent. Activate only as a sorcery.

Infiltrate (Whenever one or more attacking creatures you control aren't blocked, this creature gets +1/+1 until end of turn.)
Other creatures you control have infiltrate.

Flying
When High Spirits enters, target creature gains flying until end of turn.

Whenever Highland Elk deals damage to a creature, return that creature to its owner's hand (if it's still on the battlefield.)

When Horizon Gazer enters, reveal the top two cards of your library. Put a noncreature card revealed this way into your hand and the rest into your graveyard.
Ascend {3}{G} ({3}{G}: Exile this creature, then return it to the battlefield transformed. Ascend only as a sorcery.)

Flash
When this creature enters, look at the top six cards of your library. You may reveal an instant card or card with flash from among them and put it into your hand. Put the rest on the bottom in a random order.

Flying
When Illusionary Steed becomes the target of a spell or ability, sacrifice it.

As long as Inconspicuous Platypus is enchanted or equipped, he's a 3/3 legendary Platypus Rogue named Agent P and can't be blocked.

Flying, prowess
Whenever you cast a noncreature spell, untap Ingenious Trickster.

Whenever Insatiable Student attacks, you may sacrifice an artifact. When you do, tap target creature an opponent controls.

When Kaone enters, if it was cast, exile target instant or sorcery card from your graveyard. If its mana value is less than or equal to the number of spells you've cast this turn, you may cast a copy of that spell without paying its mana cost. If you don't cast a copy this way, put the exiled card into your hand.

Art of war — At the beginning of your end step, if Kowareta Informant dealt damage to an opponent this turn, draw a card, then discard a card.

Art of war — At the beginning of your end step, if Kowareta Scrounger dealt damage to an opponent this turn, you may search your library for an artifact card, reveal it, put it into your hand, then shuffle.