The Ur-Dragon [Secret Lair Drop Series] Human Wizard Sliver spells can't be countered

Sliver spells can't be countered

Set: Mirage Type: World Enchantment Rarity: Rare Cost: {2}{B} Players can't gain life

When Craterhoof Behemoth enters the battlefield

and not the gales

nurtured not by soil and rain

The Ur-Dragon [Secret Lair Drop Series] Human Wizard Sliver spells can't be counteredSet: Secret Lair Drop Series 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.