Pretty straightforward, but playing at instant speed is a hallmark of a good control deck
While its probably just a sideboard card, I would be willing to bet that itll be a sideboard card that, while it probably wont get banned like Veil of Summer, will be almost as much of a staple as Dovins Veto, Duress, and Sorcerous Spyglass
The recursion is okay if you want a creature to come back that has a nice ETB or death effect
This can take the form of baddies who love to inflict status ailments on your allies, or lopsided enemy parties that favor a specific job class, like samurai, summoners, and time mages
At least so long as Rotting Regisaur is one of the top offensive creatures in the format
And it'll make you a 1/1 Spirit flying token for free for your trouble