msem-instigator

Your opponents play with the top card of their library revealed.
Your opponents can't cast spells during your turn.
You may play lands and cast spells from the top of an opponent's library during your turn.

Surveil 3. Then you gain 3 life and draw three cards. (To surveil 3, look at the top three cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
Cycling {2} ({2}, Discard this card: Draw a card.)

Lifelink
Rafiq the Magnanimous has double strike as long as it's attacking.
Whenever Rafiq the Magnanimous attacks, if it's enchanted, equipped, or was the target of a spell or ability you controlled this turn, draw a card.

Lifelink
When Sacellum Visionary enters, draw a card.

Put target creature on top of its owner's library. All other creatures that player controls get -2/-2 until end of turn.

Flying
When Scorchpass Sovereign enters, it deals 1 damage to each creature with flying you don't control.

{T}, Sacrifice a creature: When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy.

Flash
Flying
When Sharuum, Archmagocrat enters, return to the battlefield all nonlegendary artifact cards in your graveyard that were put there from the battlefield this turn.

Lifelink
Each other artifact creature you control enters with an additional +1/+1 counter on it.

First strike
Whenever Sighted-Caste Knight deals combat damage to a player, draw a card.

Counter target spell. Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Gain control of target creature until end of turn. Untap it. Until end of turn, it gets -1/-1 and gains haste.

Flying
Other creatures you control with flying get +2/+2.

Vigilance, reach
Noncreature spells cost {2} more to cast.
Cycling {2} ({2}, Discard this card: Draw a card.)

Sun-Dappled Paragon enters with a +1/+1 counter on it for each other creature you control.
Whenever another creature you control enters, put a +1/+1 counter on Sun-Dappled Paragon.

Whenever you gain life for the first time each turn, draw a card.
{3}{G}{W}: You gain life equal to the greatest toughness among creatures you control.

{T}: Tap target creature.
{T}: Draw a card, then discard a card.
Whenever another artifact you control enters, untap Telemin Architect.

Exile target creature an opponent controls. Each player may search their library for a basic land card and put that card onto the battlefield tapped. Then each player who searched their library this way shuffles.

Flying
At the beginning of combat on your turn, gain control of up to one target creature an opponent controls. If you do, untap it, and it gets +4/+4 and gains flying and haste until end of turn. Sacrifice it at the beginning of the next end step.

Whenever Thrinax Sporemother or another nontoken creature you control dies, create a 1/1 green Saproling creature token.
Whenever a creature card is exiled from your graveyard, create a 1/1 green Saproling creature token.

First strike
If one or more creature tokens would be created under your control, for each of those tokens, you may create three 2/2 green Cat Warrior creature tokens instead.

Whenever another nontoken creature you control enters, that creature gains haste until end of turn. Then Tremor Seer deals 1 damage to any target.

At the beginning of your end step, draw a card if a creature died this turn. Then Tumultipede deals 2 damage to each opponent if two or more creatures died this turn. Then create three 1/1 green Saproling creature tokens if three or more creatures died this turn.

When Varakna Wurm enters, it deals X damage to target creature an opponent controls, where X is the total number of creature cards you own in exile and in your graveyard.
Cycling {2} ({2}, Discard this card: Draw a card.)

[+2]: Destroy up to one target monocolored permanent.
[–3]: Create an 8/8 Elemental creature token with flying, first strike, vigilance, trample, and lifelink that's all colors.
[–5]: Draw three cards. You pay {0} rather than pay the mana cost for the next spell you cast this turn.