Obscuring Aether [Dragons of Tarkir] BW73 You can only use this

You can only use this effect of "Virtual World Xiezhi - Jiji" once per turn

or Special Summoned from your Extra Deck by Tributing the above cards you control (in which case you do not use "Polymerization")

Set: Egyptian God Deck: Obelisk the Tormentor Card type: Normal Spell Rarity: Common Target 5 monsters in your GY

send 2 monsters with different names from your Extra Deck to the GY

send 1 DARK "Vampire" monster from your hand or Deck to the Graveyard

Obscuring Aether [Dragons of Tarkir] BW73 You can only use thisSet: Dragons of Tarkir Type: Enchantment Rarity: Rare Cost: {G} Face down creature spells you cast cost {1} less to cast. {1}{G}: Turn Obscuring Aether face down. (It becomes a 2 2 creature.)