When a creature with both persist and undying dies, if it had no counters on it you decide the order in which both of the triggers resolve
And again and again and again and again
Right out of the gates we get the most expensive card in all of Magic's history, Draco
There are only a dozen or so other mono-blue ninja cards, and you need more than that to make use of Higure's triggered ability constantly
8 - Emrakul, the Promised End Here we have the Flying Spaghetti Monster herself, Emrakul, the Promised End
[FOIL] Olivia, Crimson Bride (Sisters of the Undead) Card details Legendary Creature Vampire Noble Mythic Flying, haste Whenever Olivia, Crimson Bride attacks, return target creature card from your graveyard to the battlefield tapped and attacking