The Ur-Dragon (Oversized) [Commander 2017 Oversized] Green Enchanted creature doesn't untap during

Enchanted creature doesn't untap during its controller's untap step

for each creature you control

Those players shuffle their libraries afterwards

Whenever a creature an opponent controls with a -1/-1 counter on it dies

The Ur-Dragon (Oversized) [Commander 2017 Oversized] Green Enchanted creature doesn't untap duringSet: Commander 2017 Oversized 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.