msem-instigator

({T}: Add {B}.)
Wretched Sanctuary enters tapped with two sanctum counters on it.
{T}, Remove a sanctum counter from Wretched Sanctuary: Add {U} or {R}.

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
Crusher Beetle can't be blocked by more than one creature.

Return target creature to its owner's hand. You may have another target creature gain flying until end of turn.

Tithe (As you cast this spell, you may tap three artifacts and/or creatures you control.)
Creatures can't attack this turn. If this spell's tithe was paid, opponents can't cast spells this turn.

Enchant creature
At the beginning of the upkeep of enchanted creature's controller, Betrayer's Mantle deals 3 damage to that player.

Menace (This creature can't be blocked except by two or more creatures.)
{1}{R}: Wandering Goliath gets +1/+0 until end of turn.

As an additional cost to cast this spell, discard your hand.
Purge four times, then you gain 1 life for each card in exile. (Exile two cards that share a type from graveyards. If you do, draw a card.)

Trample
Leafdown Hunk enters with two +1/+1 counters on it if you control another creature with power 4 or greater.

Desecrate (When this creature enters, you may sacrifice an artifact or land.)
When Furnace Golem desecrates a permanent, you may return target artifact card from your graveyard to your hand.

When Sentient Contraption enters, create a 1/1 colorless Thopter artifact creature token with flying.

Creatures you control get +2/+0 until end of turn. Creatures target player controls gain winnow until end of turn. (Damage dealt to it also causes its controller to lose that much life.)

Return target creature to its owner's hand. Its controller loses 1 life.

Calfu, Greatest Toqui is all colors.
As long as there are five or more basic land types among lands you control, other creatures you control get +2/+1 and have vigilance.
When Calfu dies, you may search your library for a card named Heart of Carü Mapu, put it onto the battlefield, then shuffle.

{T}, Sacrifice Hazy Lagoon: Search your library for a Plains or Island card and put it onto the battlefield tapped, then shuffle.

Whenever you cast a Rogue spell or a spell from exile, you may return Cobri to her owner's hand.

All creatures get -1/-1 until end of turn.
If ten or more cards are in your graveyard, creatures your opponents control get an additional -1/-1 until end of turn.

Put all attacking creatures on top of their owners' libraries.

When Fateshifter's Prophet enters, you gain 2 life and scry 2.

This spell costs {2} less to cast if you control an Azra or Demon.
Target creature you control gets +4/+4 and gains trample until end of turn.

Forbidding Isle enters tapped unless you control a Swamp.
{T}: Add {U} or {R}.

{T}, Sacrifice an artifact or creature: Fracking Factory deals 2 damage to each opponent. Activate only as a sorcery.

Target creature you control deals damage equal to its power to another target creature. You gain life equal to the damage dealt this way.

[+1]: Exile the top two cards of your library. You may play up to one card exiled this way this turn.
[–2]: Menna Al-Mejjat deals 3 damage to target creature. If that creature would die this turn, exile it instead.
[–6]: Draw cards equal to the number of cards in exile. Menna Al-Mejjat deals that much damage to any target.

Lifelink
Mind-Pryer gets +1/+1 as long as an opponent has one or fewer cards in hand.
Whenever an opponent discards a card, Mind-Pryer cackles. (Put a menace counter on it. If it already has menace, it deals 1 damage to each opponent instead.)

You may put a permanent card from your hand onto the battlefield.
Rerun (If you cast this from your hand, exile it as it resolves. Whenever a creature you control dies, you may cast this card from exile without paying its mana cost.)