001 pokemon card Bulbasaur - 001/165 (SV2a) Common - Near Mint (CGC RarityCommon Hit Points80 HP Grass Bind Down (10) During your opponents next turn Pokémon TCG Bulbasaur 001/078 Pokémon

EXPAND YOUR COLLECTION: BOOSTER PACKS

If you have a full party, you may cast a spell with mana value 4 or less from your hand without paying its mana cost

If the destroyed permanent's controller chooses to cast the exiled card without paying its mana cost, they can't choose to cast it for any alternative costs

Personally however, I think the Grey and Back imprinted theory is probably correct

If a spell or ability you control targets a creature an opponent controls with hexproof and Nowhere to Run leaves the battlefield while that spell or ability is on the stack, that creature becomes an illegal target for that spell or ability