msem-instigator

{1}{R}, Discard a card: Draw a card. Mist-Valley Minotaurs gets +2/+0 until end of turn.

Mill three cards, then counter target spell unless its controller pays {X}, where X is the greatest mana value among cards milled this way.

Whenever a creature you control becomes the target of a spell, that creature gets +3/+3 until end of turn.

Target creature gets +1/+1 until end of turn for each creature you control.
Inscribe {3}{R} ({3}{R}: Exile this card from your hand inscribed on a creature you control. Whenever that creature attacks, its controller may cast a copy of the inscribed card without paying its mana cost. Inscribe only as a sorcery.)

Vanishing 3
Whenever a time counter is removed from Prayers of Judgement, each player loses 1 life and mills two cards.

Flying, vigilance
At the beginning of your end step, if a creature you control dealt combat damage to an opponent this turn, put a +1/+1 counter on Horizon Prophet.

Choose a card name, then reveal the top five cards of your library. You may put a card with the chosen name into your hand. Put the rest on the bottom of your library in any order.
Draw a card.

[+1]: Create a 1/1 red Cleric creature token. If you control three or more Clerics, you may instead create Aspect of Faradia, a legendary 5/5 white Angel creature token with flying and vigilance.
[–1]: Exile target creature if you control an Angel. Otherwise, that creature can't attack or block and its activated abilities can't be activated until your next turn.
[–7]: Creatures you control get +5/+5 and gain flying and vigilance until end of turn.

Menace
When Doomed Questant enters, each opponent sacrifices a creature and discards a card.

Target player discards a card.
Monument {1}{B} (You may cast this transformed from your graveyard for its monument cost. Exile it if it would leave the battlefield or not resolve.)

Once during each of your turns, when you sacrifice a permanent, you may have target opponent lose 3 life unless they sacrifice a nonland permanent or discard a card.

When Godwatcher enters, search any player's library for a creature card, exile it, then they shuffle their library.
When Godwatcher dies, put the exiled card onto the battlefield under your control.

Voracious 2 (As this enters, you may sacrifice up to two artifacts and/or creatures. This creature enters with that many +1/+1 counters on it.)
Trample
At the beginning of your end step, if a creature died under your control this turn, create a 1/1 green Saproling creature token.

Whenever you cast a noncreature spell, create a 1/1 colorless Servo artifact creature token.
{1}{U}, {T}, Exile three noncreature cards from your graveyard: Draw a card.

Whenever Align with Animus Vox enters or you attack with three or more creatures, crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)

Revive {3}{B} ({3}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — You may create a token that's a copy of target Aura you control. Attach it to target permanent you control.
III — Put a +1/+1 counter on each enchanted creature you control. Those creatures gain indestructible and vigilance until end of turn.

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)
As you reveal a creature card, you may exile it. If you do, you may play that card as long as it is exiled and that spell can't be countered by spells or abilities.

Bleed {2}{U} (You may cast this spell for its bleed cost if an opponent has lost life this turn.)
Put target creature on top of its owner's library.

When Acolyte of Griselbrand dies, you draw a card and you lose 1 life.
Foreshadow {4}{B} (You may cast this spell for its foreshadow cost. If you do, also trigger its “dies” abilities when it enters.)

Reach, vigilance
When Amorphous Tyrant enters, another target creature you control deals damage equal to its power to target creature or planeswalker you don't control.
Evoke {G} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

{1}{U}, Tap an untapped Noble you control: Hired Blades gets +2/+1 until end of turn and can't be blocked this turn.

Archive 5 (As this enters, shuffle the top five cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Whenever a player discards a card, draw a card from the archived library.