Brago, King Eternal is pleased by his new heir. The cheapest 'ETB: flicker a thing' card, I believe, edging out
Flickerwisp. Only hits creatures you own, which limits it somewhat (can't remove a blocker, for example), but most things you'll want to flicker are yours anyway. Also capable of rescuing a stolen /
Mind Control'd princess. And if you somehow have no creatures worth flickering, the base case of scry 2 or gaining life is still pretty good.
Also, I missed that he was a charm on my initial evaluation. That's pretty fantastic.