Choke out your opponents resources, hit someone with Brago when their shields are down, blink as many of your permanents as you want to untap them and break parity (including Brago himself), then grind the table down or set up a combo to win the game as desired
While its power level is just shy of the all-timer cantrips, its still one of the better blue options
With mana rocks, equipment, randomly artifact dorks like Solemn Simulacrum and then the enchantment that could be quite the threat
Message me if youd prefer them excluded
Ghostly Prison usually affords opponents just enough wiggle room to crash in with one big attacker, but with enough enchantments on board, Sphere of Safety can prevent attacks altogether
I made it at a 2:1 ratio to try and keep it in check power-wise