The Reaver Cleaver (Extended Art) [Dominaria United Commander] East Blue during your opponent's Standby Phase:

during your opponent's Standby Phase: You can inflict 300 damage to your opponent for each card your opponent controls

Set: The Lost Art Promotion Card type: Quick Play Spell Rarity: Ultra Rare Target 1 face-up monster on the field

Set: Battle of Omni Promos Card type: Digimon Rarity: Rare Digi type: Shaman Play Cost: 12 Form: Mega Attribute: Data Digivolve Cost: 3 Digivolve Cost Level: 5 [Opponent's Turn] When an opponent's Digimon moves from the breeding area to the battle area

if you have a heart card with "PRISM" in its card name

if another card(s) you control is destroyed by battle or an opponent's card effect: You can attach 1 card from your hand

The Reaver Cleaver (Extended Art) [Dominaria United Commander] East Blue during your opponent's Standby Phase:Set: 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}