msem-instigator

Flying, lifelink
Whenever a creature you control dies, Vindictive Regent gets +1/+1 until end of turn.
At the beginning of your end step, if you gained 3 or more life this turn, each opponent sacrifices a creature.

Whenever equipped creature attacks, choose one —
• Tap target creature.
• Draw a card, then discard a card.
• Exile target card from a graveyard.
Equip {3}

Flying
Vanguard — Whenever a creature you control attacks alone, it gains first strike until end of turn.

Return a permanent card from your graveyard to your hand.
Motley — If there are five or more names among nonland permanents you control, return two permanent cards from your graveyard to your hand instead.

Copy target instant or sorcery spell. You may choose new targets for the copy.

Put two +1/+1 or loyalty counters on target creature or planeswalker. It gains lifelink until end of turn.

Flying
When Foul Vulture enters, create a 1/1 red Hound creature token.
Foul Vulture gets +1/+0 as long as a creature you controlled died this turn.

{1}, {T}, Sacrifice Looking Glass: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Kindle 1—{1} ({1}, Exile this card from your graveyard: Create a 1/1 colorless Elemental creature token. Kindle only as a sorcery.)

Trample, haste

Discard your hand, then draw three cards. If you spent at least {W}{U}{B}{R}{G} to cast this spell, you may cast any number of cards drawn this way without paying their mana costs.
Exile Face Your Demons.

Choose one —
• Create two 1/1 white Soldier creature tokens. They gain haste until end of turn.
• Destroy target nonbasic land.

Basic Forests you control have “{G}, {T}: Untap target attacking creature and remove it from combat.”

Sacrifice a creature: Soulsorrow Shade gets +2/+2 until end of turn.

Waterfront Market enters tapped unless you control a basic land.
{T}: Add {W} or {U}.

As long as you control exactly two creatures, those creatures get +2/+1 and have lifelink.

Put target creature card from a graveyard onto the battlefield under your control. If that card was put into that graveyard this turn, it enters with an additional +1/+1 counter on it.

Infiltrate (Whenever one or more attacking creatures you control aren't blocked, this creature gets +1/+1 until end of turn.)
Whenever Captain of the Exiled deals combat damage to a player, draw a card.

You may have Sun Yun enter as a copy of any creature on the battlefield, except her name is Sun Yun, Master of Man, she's legendary in addition to her other types, and she has “{2}{U}: Exile Sun Yun, then return her to the battlefield under her owner's control.”

Eureka! (At the beginning of each end step, you get a research counter if you cast a spell this turn. Then if you have eight or more research counters, remove them and create a Masterpiece token of your choice.)
Whenever you cast a noncreature spell, create a 1/1 colorless Construct artifact creature token.

Elemental, instant, and sorcery spells you cast cost {1} less to cast.

Equipped creature has hexproof and distorted. (It can be blocked by tapped creatures but not untapped creatures.)
Equip {1}

This spell costs {X} less to cast, where X is half the number of creatures on the battlefield, rounded down.
Destroy all creatures.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
{T}, Tap an untapped creature you control: Add one mana of any color.
{G}: Demigod — Whenever you cast a creature spell this turn, draw a card.
{4}{G}{G}: God — Creatures you control get +3/+3 and gain trample until end of turn.

Mark (Whenever this creature attacks, mark target creature until end of turn.)
Whenever Gentleman Thief deals combat damage to a player, gain control of target marked creature.

Soldiercycling {2}{W} ({2}{W}, Discard this card: Search your library for a Soldier card, reveal it, and put it into your hand, then shuffle.)