The Reaver Cleaver (Extended Art) [Dominaria United Commander] Nightmare and has "Whenever a player

and has "Whenever a player casts a spell or a creature attacks

” —Elesh Norn

it deals 1 damage to target player or planeswalker and you gain 1 life

Set: The Brothers' War Retro Artifacts Type: Artifact Creature — Phyrexian Horror Rarity: Rare Cost: {5} Psychosis Crawler's power and toughness are each equal to the number of cards in your hand

Set: 30th Anniversary Edition Type: Enchantment — Aura Rarity: Uncommon Cost: {2}{U} Enchant enchantment

The Reaver Cleaver (Extended Art) [Dominaria United Commander] Nightmare and has "Whenever a playerSet: Dominaria United Commander Type: Legendary Artifact Equipment Rarity: Rare Cost: {2}{R} Equipped creature gets +1 +1 and has trample and Whenever this creature deals combat damage to a player or planeswalker, create that many Treasure tokens. Equip {3}