If you’re not casting Prossh, Jeleva, or Marath, their cast/enter the battlefield abilities won’t do anything.
Tag: Jeleva Nephalia’s Scourge
A spell cast via Jeleva’s trigger goes to the graveyard when it’s done resolving
Just because you cast a spell from exile, that doesn't mean it goes there when it resolves!
Jeleva only has access to the cards it exiled, not to cards exiled by another Jeleva
Jeleva can only track the cards it exiled when it entered the battlefield as long as it remains on the battlefield. If Jeleva leaves and comes back, it forgets all the previously exiled cards.