ur dragon mtg commander deck EDH Deck The Ur-Dragon 100 Magic Cards Custom Deck Dragons Powerful 10/10 Illustrated by Jaime Jones. The Ur Dragon deck is

I immediately think of combining this with Prosper, Tome-Bound to generate additional Treasure tokens when we play cards from exile, in addition to the potential to steal cards from the opponent

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You can do it again during that next combat step and repeat ad nauseam as long as you dont dip below five attackers each time

The artifact requires a pretty high cost to get the chain started, though - four mana (or three and two life) to cast, then two mana (or one and two life), a tapped card and a sacrificed creature to set its ability in motion