Control Magic

Enchant creature
You control enchanted creature.

Plains

Sen Triplets

At the beginning of your upkeep, choose target opponent. This turn, that player can't cast spells or activate abilities and plays with their hand revealed. You may play lands and cast spells from that player's hand this turn.

Grand Arbiter Augustin IV

White spells you cast cost {1} less to cast.
Blue spells you cast cost {1} less to cast.
Spells your opponents cast cost {1} more to cast.

Island

True Believer

You have shroud. (You can't be the target of spells or abilities.)

Mind Control

Swamp

Treachery

Enchant creature
When Treachery enters, untap up to five lands.
You control enchanted creature.

Mana Maze

Players can't cast spells that share a color with the spell most recently cast this turn.

Sol Ring

Dominate

Gain control of target creature with mana value X or less.

Venser, the Sojourner

+2: Exile target permanent you own. Return it to the battlefield under your control at the beginning of the next end step.
−1: Creatures can't be blocked this turn.
−8: You get an emblem with "Whenever you cast a spell, exile target permanent."