The Reaver Cleaver (Extended Art) [Dominaria United Commander] Heavy Hitters and gains "Cards you own

and gains "Cards you own are the class of your hero in addition to their other class types

Set: Promo Finish: Cold Foil Type: Weapon Subtype: Dagger (1H) Rarity: Promo Class: Mystic Assassin Power: 1 Once per Turn Action — [2 Resource]: Attack

Then each creature you control becomes a Phyrexian in addition to its other types

x1][When Attacking] You may trash 1 card from your hand : Add up to 1 DON

If this was played from arsenal

The Reaver Cleaver (Extended Art) [Dominaria United Commander] Heavy Hitters and gains "Cards you ownSet: 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}