Crib Swap can be cast from gy using Horde of Notions right? And does it exile the spell since it was cast from the gy or that's specifically for flashback mechanic? Thank you! :)
Yes, you can cast it with Horde of Notionsâs ability.
Crib Swap wonât be exiled since nothing is telling it to go to exile or anywhere else. Itâll just go back to the graveyard.
Exiling an instant or sorcery thatâs cast from the graveyard is specifically part of flashback. Any other effects that let you cast instants or sorceries in graveyards have to specifically say where the card goes when it resolves if itâs not to the graveyard.