Swift Reckoning

Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, you may cast this spell as though it had flash. (You may cast it any time you could cast an instant.)
Destroy target tapped creature.

Decompose

Exile up to three target cards from a single graveyard.

Disruption Protocol

As an additional cost to cast this spell, tap an untapped artifact you control or pay {1}.
Counter target spell.

Bone to Ash

Counter target creature spell.
Draw a card.

Repel Calamity

Destroy target creature with power or toughness 4 or greater.

Memory Drain

Ultimate Price

Hindering Light

Counter target spell that targets you or a permanent you control.
Draw a card.

True Love's Kiss

Exile target artifact or enchantment.
Draw a card.

Exorcise

Exile target artifact, enchantment, or creature with power 4 or greater.

Essence Scatter

Yennett, Cryptic Sovereign

Flying, vigilance, menace
Whenever Yennett attacks, reveal the top card of your library. You may cast it without paying its mana cost if its mana value is odd. If you don't cast it, draw a card.