CMM: Urza, Lord High Artificer meta-overstock that player may exile a

that player may exile a card from their graveyard

modifications

if it doesn't have the same name as another creature you control or a creature card in your graveyard

Declare war on your friends

The Rivals for Catan features a reduced pool of cards

CMM: Urza, Lord High Artificer meta-overstock that player may exile aWhen Urza, Lord High Artificer enters, create a 0 0 colorless Construct artifact creature token with "This creature gets +1 +1 for each artifact you control." Tap an untapped artifact you control: Add {U}. {5}: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.