Altar of Dementia (Retro Schematic) [The Brothers' War Retro Artifacts] 43 except their base power is

except their base power is half that creature's power and their base toughness is half that creature's toughness

it's affected by summoning sickness

Set: Limited Edition Alpha Type: Enchantment — Aura Rarity: Common Cost: {1}{U} Enchant creature

Set: Ultimate Masters Type: Instant — Arcane Rarity: Rare Cost: {X}{U}{U} You may exile a blue card with converted mana cost X from your hand rather than pay this spell's mana cost

Altar of Dementia (Retro Schematic) [The Brothers' War Retro Artifacts] 43 except their base power isSet: The Brothers' War Retro Artifacts Type: Artifact Rarity: Mythic Cost: {2} Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power. My dreams have brought more visions from our master: an altar, exquisite and perfect. We must build it at once. Writings of Artonac, priest of Gix