Megrim [Stronghold]Set: Stronghold Type: Enchantment Rarity: Uncommon Cost: {2}{B} Whenever an opponent discards a card, Megrim deals 2 damage to that player. "You can run from your pain," explained Gerrard to Crovax, "but take it from experience: you will tire before it does."

Set: Kaladesh Type: Artifact Rarity: Rare Cost: {1} Whenever one or more +1/+1 counters are put on a permanent you control

counter it unless that player pays {3}

Set: POP Series 5 Type: Psychic Rarity: Ultra Rare Retreat cost: Colorless

(A creature with intimidate can't be blocked except by artifact creatures and/or creatures that share a color with it

Set: EX: Deoxys Type: Psychic Rarity: Uncommon Retreat cost: Colorless

Ral's storm crackled with mystical detections: Planeswalkers were infiltrating Ravnica

you can't be attacked except by creatures with flying and/or islandwalk

When Siege Dragon enters the battlefield

If you listen

Set: Planechase Type: Creature — Zombie Rat Rarity: Common Cost: {1}{B} When Rotting Rats enters the battlefield

Phyrexian prophecies glowed on the Tree of Tales

−1: Return target creature card from your graveyard to your hand