I made this card for Caleb Gannon's custom card contest last year. The idea was to create a powerful piece of white interaction for his custom vintage cube. For that reason, the power level is intentionally higher than your typical standard-legal card.
This is neat! I'm not sure if it's too overpowered to be hypothetically printed, but it does seem very good. Basically every White deck that could run this would want to, I'd imagine.