msem-instigator

At the beginning of your end step, mill two cards and you lose 2 life.
Arise {3}{B}{R} ({3}{B}{R}, Exile this from your graveyard as a sorcery: Create a black token copy of it that's also a Zombie and can't block.)

Target player loses 1 life. Scry 1.
Fabled {2}{B} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that player.)

Spells your opponents cast that target Shoalshine cost an additional {2} to cast.
Concord — {T}: Draw a card. Activate only if there are four or more card types among permanents you control.

Flying
When Midnight Visitor enters, you may return target creature to its owner's hand.

Creature spells you cast cost {1} less to cast.
Whenever you cast a creature spell, Bellowing Thoctar gets +2/+2 until end of turn.

{T}: Add {C}.
Satrapies you control have “{U}, {T}: Each opponent mills a card.

When Poisoned Shiv enters, destroy target creature or planeswalker.
Equipped creature gets +2/+0 and has deathtouch.
Equip {2}

Once each turn for each card type, when you cast a spell with that type, you may copy it. You may choose new targets for the copy. If it's a permanent spell, the copy gains haste and “At the beginning of the end step, sacrifice this permanent.”
Whenever a permanent you control dies, it deals 1 damage to each opponent.

{T}: Add {C}.
{4}, {T}, Sacrifice Eon Campfire: Destroy target artifact or nonbasic land.

Enchant creature
Enchanted creature gets +2/+2.
Whenever enchanted creature attacks, create a 2/2 white Knight creature token that's tapped and attacking.

{T}: Add one mana of any color.
{X}: Terracotta Idol becomes a Spirit artifact creature with base power and toughness X/X until end of turn. Activate only as a sorcery.

{T}: Target player exiles a card from their graveyard. If they do, you gain 1 life.

Destroy target token.

Haste
Disgraced 1 (This enters with a -1/-1 counter. Whenever it deals combat damage to a player, remove all -1/-1 counters from it.)

Flying
Whenever Olivia Voldaren, Progenitrix attacks, you may discard a card. If you do, draw a card.
Whenever you discard a creature card, put a +1/+1 counter on Olivia Voldaren, Progenitrix and create a 1/1 black and red Vampire creature token with menace.

Trample
When Arpechian Bellowers enters, harmonize. (Trigger up to one harmony of a permanent you control.)
Harmony — Search your library for a green creature card, reveal it, put it into your hand, then shuffle.

Target creature can't be blocked this turn.
Draw a card.

First strike
Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)
{6}, {T}: Search your library for a creature card with distorted, put it onto the battlefield, then shuffle.

Wither (This deals damage to creatures in the form of -1/-1 counters.)
{X}{R}: Hearth Dweller gets +X/+0 until end of turn.

Chosen one ({W}{U}{B}{R}{G}: Transform this permanent.)
When Keeper of Holy Lands enters, you may search your library for an enchantment card, reveal it, then shuffle and put that card on top of it.

Search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle.
You may put up to two land cards from your hand onto the battlefield tapped.

Reprise {3}{U} (As you cast an instant or sorcery spell, you may exile one card with reprise from your graveyard and pay its reprise cost. If you do, add its effects to that spell.)
Create a Treasure token. You draw cards equal to the number of tokens created by this spell.

Poisonous 2 (Whenever this creature deals combat damage to a player, that player gets two poison counters.)
Sankataar Coilborn gets +1/+1 as long as an opponent is poisoned.

{1}{U}: Twilight Privateer voyages. (If it isn't blocking or targeted by another spell or ability, it phases out.)
Whenever Twilight Privateer phases in, up to one other target creature voyages.

Flying (This creature can't be blocked except by creatures with flying or reach.)
{R}: Newborn Dragon gets +1/+0 until end of turn.