Revoke Existence

Skyknight Legionnaire

Codie, Vociferous Codex

You can't cast permanent spells.
{4}, {T}: Add {W}{U}{B}{R}{G}. When you next cast a spell this turn, exile cards from the top of your library until you exile an instant or sorcery card with lesser mana value. Until end of turn, you may cast that card without paying its mana cost. Put each other card exiled this way on the bottom of your library in a random order.

Guttural Response

Macabre Waltz

Return up to two target creature cards from your graveyard to your hand, then discard a card.

Rogue Kavu

Whenever Rogue Kavu attacks alone, it gets +2/+0 until end of turn.

Naturalize

Chandra's Embercat

{T}: Add {R}. Spend this mana only to cast an Elemental spell or a Chandra planeswalker spell.

Samite Ministration

Prevent all damage that would be dealt to you this turn by a source of your choice. Whenever damage from a black or red source is prevented this way this turn, you gain that much life.

Impact Tremors

Whenever a creature you control enters, this enchantment deals 1 damage to each opponent.