msem-instigator

Target creature you control gets +0/+6 until end of turn and can block an additional creature this turn. Untap it.

Until end of turn, creatures and artifacts you control gain “{T}: Tap target permanent.”

Prevent all combat damage that would be dealt this turn by non-Army creatures.
Amass Soldiers 2. (Put two +1/+1 counters on an Army you control. It's also a Soldier. If you don't control one, create an 0/0 black Soldier Army creature token first.)

If a card would be put into an opponent's graveyard from anywhere, instead that card is revealed and put on the bottom of that player's library.
Unveil {3}{G}{W} ({3}{G}{W}: Transform this. Unveil only as a sorcery.)

Trample, ward {1}
Whenever Stardust Surveyor deals combat damage to a player, you may mill cards until you mill a creature card. When you do, return target creature card from your graveyard to your hand.

You gain 4 life. Then if {R} was spent to cast Starglare, it deals 4 damage to up to one target creature.

Draw two cards. If you have no cards in hand and there are no cards in your graveyard, draw seven cards instead.

Augmented — If you've spent {W}{U}{B}{R}{G} to cast spells this turn, you may play Start Over without paying its mana cost.
Put target creature or planeswalker on the bottom of its owner's library.

You may discard a card. If you do, draw two cards.
Type leitmotif (If you cast this spell from your hand, exile it as it resolves. When you cast your next spell that shares a type with this card, you may cast this from exile without paying its mana cost.)

Each player chooses up to half the creatures they control, then sacrifices the rest.

Flash (You may cast this spell any time you could cast an instant.)
When Stasis Snare enters, exile target creature an opponent controls until Stasis Snare leaves the battlefield.

{T}: Add {C}.
{3}, {T}: Create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

{G}, Discard a card: Staunch Constrictor gets +1/+1 until end of turn.

Enchant creature
Enchanted creature gets +2/+3.
As long as enchanted creature has a +1/+1 counter on it, it has vigilance.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Create a 3/3 black Demon Horror creature token.
Compose (Then if you cast this from your hand, exile it and create a Saga token with “r3—You may cast a copy of this card from exile without paying its mana cost.”)

Whenever Stealer of Secrets deals combat damage to a player, draw a card.

Equipped creature gets +1/+0 for each artifact you control.
Equip—Sacrifice an artifact.

Flying
Whenever a player shuffles their library, Steamquiver Strix deals 2 damage to that player.

Flying
Embellish {4}{U} (If you cast this spell for {4}{U}, create a 1/1 blue Thopter artifact creature token with flying when it enters.)

Whenever Steelcrusher Viking blocks or becomes blocked by a creature, destroy up to one target Aura or Equipment attached to that creature.

Target creature gets +1/+5 until end of turn.
Draw a card.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Whenever Steelhoof Battlechief attacks, another target attacking creature you control gets +2/+2 and gains trample until end of turn.

When Steward of Empire's Cradle enters, you may search your library for a Discovery, Quest, or Saga card, reveal it, then shuffle and put that card on top.
Civilized — If an ability of an enchantment you control triggers, if you control an artifact, a creature and an enchantment, that ability triggers an additional time.

Whenever Steward of Silence blocks, you get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)