msem-instigator

({T}: Add {B} or {R}.)
Urban Wastelands enters tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

Choose target creature you control. If it has a +1/+1 counter on it, put an additional +1/+1 counter on it. Then it fights target creature you don't control.

Target creature gets -3/-3 until end of turn. If that creature would die this turn, exile it instead.

Trample
Whenever a Warrior you control dies, it deals 1 damage to any target.

Exile target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Flying
When Bleak Condor enters, mill four cards.

At the beginning of each player's end step, that player sacrifices a permanent.

Flying
When Glenach enters, put three -1/-1 counters on a creature you control.
When Glenach leaves the battlefield, return target non-Insect permanent card from your graveyard to your hand.

Whenever one or more cards leave your graveyard for the first time each turn, each player loses 1 life and you draw a card.

Target opponent chooses a creature card in your graveyard. Return the chosen card from your graveyard to your hand.

When Desert Bloom enters, you gain 4 life.
At the beginning of your upkeep, add {G}{G}.

Play with the top card of your library revealed.
You may cast creature spells from the top of your library. You may cast Centaur spells this way without paying their mana costs.

Double strike, trample, indestructible, haste
When Dredgeline Colossus enters, salvage up to eight noncreature, nonland cards. (You may exile them from your graveyard until this creature leaves the battlefield. Whenever this creature deals combat damage to a player, put a card it salvaged into your hand.)

When Wildsong Summoner enters, shuffle your library, then reveal cards from the top until you reveal a permanent card. Create a token that's a copy of that card, except it's a 3/3 green Beast creature. Put all cards revealed this way on the bottom of your library in a random order.

At the beginning of your end step, if a permanent was put into your graveyard from the battlefield this turn, put a +1/+1 counter on Vulture Corps.

This spell costs {1} less to cast if it targets a creature with power 3 or less.
Destroy target attacking or blocking creature.

When Silvercrest Historian enters, scry 1, then investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

When Hermetic Fisher dies, you may return target creature to its owner's hand.

Choose one —
• Scry 3. Draw a card.
• Fateseal 3. That player draws a card. (To fateseal 3, look at the top three cards of an opponent's library, then put any number of them on the bottom of that player's library and the rest on top in any order.)

Whenever Essence Carver blocks or becomes blocked by a creature with toughness 4 or greater, Essence Carver gets +2/+2 until end of turn.

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
When Shaman of the First Pact enters, exile up to four target creature cards from graveyards. You may cast them for as long as they remain exiled and you may spend mana as though it were mana of any type to cast them.

When Sire of the Wild enters, reveal the top four cards of your library. You may put a creature card from among them onto the battlefield. Shuffle the rest into your library.

Equipped creature gets +4/+2.
Equip—Sacrifice a creature. (Sacrifice a creature: Attach to target creature you control. Equip only as a sorcery.)

Dutiful Chasqui gets +2/+1 as long as you control two or more other creatures that share a name with it.
A deck can have any number of cards named Dutiful Chasqui.

Shimmer (Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the end step.)
Each other creature you control gets +1/+1 for each creature you control with the same name as it. (A token's name is its creature types unless specified.)