Heartless Summoning [Innistrad]Set: Innistrad Type: Enchantment Rarity: Rare Cost: {1}{B} Creature spells you cast cost {2} less to cast. Creatures you control get 1 1. "They won't be winning any beauty pageants, but they'll do the trick." Enslow, ghoulcaller of Nephalia

Set: EX: Unseen Forces Type: Special Energy Rarity: Uncommon

if you're the defending player

Whenever a creature enters the battlefield under an opponent's control

Set: EX: Ruby & Sapphire Type: Lightning Rarity: Holo Rare Retreat cost: Colorless

perfect order

Set: Sun & Moon: Guardians Rising Type: Water Rarity: Secret Rare Retreat cost: Colorless

Set: Classic Sixth Edition Type: Creature — Human Wizard Rarity: Rare Cost: {1}{U}{U} {T}

Set: Kaladesh Type: Artifact Rarity: Rare Cost: {4} If an artifact or creature entering the battlefield causes a triggered ability of a permanent you control to trigger

Set: Sun & Moon: Forbidden Light Type: Fighting Rarity: Secret Rare Retreat cost: Colorless

Set: Legends Type: Enchantment Rarity: Uncommon Cost: {2}{G} Creatures with forestwalk can be blocked as though they didn't have forestwalk

detain up to two target nonland permanents your opponents control

Set: EX: Hidden Legends Type: Psychic