msem-instigator

Deft Goldsnatch can't be blocked.

Flash
When Duplicated Dismantler enters, if you cast another spell this turn, return target spell to its owner's hand.

When Edina's Soulsinger enters, create a 1/1 blue Jellyfish enchantment creature token with slipstream. (It can't be blocked as long as only creatures with slipstream are attacking.)

When Ekebram's Scribe enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Foresight — Whenever you draw your second card each turn, Elusive Sage can't be blocked this turn.

{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.)

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.)

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.