The Ur-Dragon [Commander 2017] Phyrexian Elf Warrior and has "At the beginning

and has "At the beginning of your upkeep

Set: Commander 2016 Type: Creature — Avatar Rarity: Rare Cost: {10}{G} This spell costs {1} less to cast for each creature your opponents control

{T}: Add {U} or {R}

destroy target noncreature permanent that player controls

The Ur-Dragon [Commander 2017] Phyrexian Elf Warrior and has "At the beginningSet: Commander 2017 Type: Legendary Creature Dragon Avatar Rarity: Mythic Cost: {4}{W}{U}{B}{R}{G} Eminence As long as The Ur Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost {1} less to cast. Flying Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.