ur dragon mtg commander deck Magic: The Gathering – Select - The Ur-Dragon Dragon Tribal MTG Proxy Ready-to-Play Commander Deck:

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Magic: The Gathering | Marvel Super Heroes features four different Commander deck versions

Urzas ability works well in Humans, as the activated ability uses strictly colorless mana, and while the ability does cost five mana, Aether Vial can be used to help pay that cost, meaning Humans has 23 mana sources to activate the ability if you count fifteen non-Ancient Ziggurat Lands, four Noble Hierarchs, and four Aether Vials

Then, you draw a card for each counter on it when it enters the battlefield, all but guaranteeing you get to refill your hand or even draw extra cards if you can load it up with enough counters