Anticausal Vestige (357) FCA then return her to the

then return her to the battlefield transformed under her owner's control

the aetheric disturbance here is no natural occurrence

investigate

Instant and sorcery spells you cast cost less to cast

Indestructible

Anticausal Vestige (357) FCA then return her to theEdge of Eternities Anticausal Vestige Creature Eldrazi When this creature leaves the battlefield, draw a card, then you may put a permanent card with mana value less than or equal to the number of lands you control from your hand onto the battlefield tapped. Warp (You may cast this card from your hand for its warp cost. Exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.) Power: 7 Toughness: 5