msem-instigator

This spell costs {2} less to cast if it targets a creature or planeswalker card with mana value 3 or less.
Return target creature or planeswalker card from your graveyard to the battlefield.

Flash
When Turned by Fear enters, return up to one target creature to its owner's hand.
At the beginning of combat on your turn, up to one target creature gains menace until end of turn.

Ganzorig's Domain enters tapped.
When Ganzorig's Domain enters, you may mill two cards.
{T}: Add {R} or {G}.

Shuffle your library, then exile cards from the top until you've exiled cards with total mana value greater than or equal to X. You may play those cards until the end of your next turn. Add X mana of any one color.
Exile Final Ballad.

At the beginning of combat on your turn, for each permanent type, aetherize up to one target permanent you control of that type. (To aetherize, create a token that's a copy of it, then exile that token.)

First strike
Whenever Martial Maestro attacks, other attacking creatures you control get +1/+0 until end of turn.

Target player sacrifices a creature or planeswalker.
Flashback {4}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Put two +1/+1 counters on target creature. (Cast a copy of this spell once while this creature is on the battlefield.)

Equipped creature has menace.
Whenever equipped creature attacks, it gets +X/-X until end of turn, where X is a number of your choice less than its toughness.
Equip {2}

Whenever you draw your second card each turn, put a +1/+1 counter on Ethereal Sneak.

Lifelink
If a source would deal damage to a player, you may prevent X of that damage, where X is the number of +1/+1 counters on Mending Caretaker.

Enchant opponent
Spells you cast that target enchanted player cost {2} less to cast.

When Hold Captive enters, exile another target nonland permanent until Hold Captive leaves the battlefield.
When Hold Captive enters, recruit. (Create a 0/0 white Soldier Army creature token, then put a +1/+1 counter on each Army you control.)

Counter target spell if four or more mana was spent to cast it.

At the beginning of combat on your turn, if you cast an enchantment spell, an instant spell, and a sorcery spell this turn, create two 3/3 red Shark enchantment creature tokens. You may have any number of those tokens gain haste. If you do, sacrifice the tokens you chose at end of combat.

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
Baptism by Fire deals 3 damage to target creature or planeswalker. If you're in a renaissance, Baptism by Fire deals 6 damage to that permanent instead.

Vigilance
Whenever Sibling of All Elements attacks, it gains flying until end of turn if you control a creature with flying. The same is true for first strike, double strike, deathtouch, indestructible, lifelink, menace, and trample.

Put target spell on top of its owner's library.
Each player conjures a card named Fatigue and puts it on top of their library. (It's a colorless sorcery that costs {2} with “Draw a card.”)

Create three 1/1 blue and red Pirate creature tokens with haste.

Players can't gain life.
Whenever a player casts a spell, Rage of the Ravaged deals 1 damage to that player.

Target permanent you control gains protection from your opponents until end of turn.
Draw a card.

{1}{U}, Sacrifice two artifacts: Draw a card.
Whenever an artifact you control dies, put a stun counter on up to one target creature. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Reach
When Sage of Staves enters, choose one —
• Sage of Staves deals 3 damage to target player or planeswalker.
• Put a +1/+1 counter on target creature you control.

Flying
When Dewdrop Ordainer dies, put a +1/+1 counter on target creature you control with a counter on it.

({T}: Add {G} or {U}.)
Monsoon Lagoon enters tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)