Cauldron of Souls [Commander Anthology Volume II] 065 Whenever an opponent casts a

Whenever an opponent casts a spell from anywhere other than their hand

Set: March of the Machine Promos Type: Enchantment Rarity: Rare Cost: {G}{G}{G} Whenever a creature enters the battlefield under your control

where X is the amount of damage it dealt to that player

Set: Sun & Moon: Black Star Promos Type: Lightning Rarity: Black Star Promo

Set: Secret Lair Drop Series Type: Legendary Planeswalker — Sorin Rarity: Rare Cost: {3}{B}{B}{B} +2: Sorin Markov deals 2 damage to any target and you gain 2 life

Cauldron of Souls [Commander Anthology Volume II] 065 Whenever an opponent casts aSet: Commander Anthology Volume II Type: Artifact Rarity: Rare Cost: {5} {T}: Choose any number of target creatures. Each of those creatures gains persist until end of turn. (When it dies, if it had no 1 1 counters on it, return it to the battlefield under its owner's control with a 1 1 counter on it.)