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
In a deck with a five-color commander, it essentially reads, "You win the game if you control your commander." That is not the most satisfying end to a game, and it does begin to become an auto-include for many decks
It's a fun and versatile mechanic, and it probably has some sweet applications we haven't even thought of yet
For collectors and enthusiasts, buying and selling Magic cardsespecially from the Alpha sethas become a cornerstone of the community, with these cards retaining immense value
However, if instead the creature's power is increased to 3 or greater after the ability resolves, it still can't be blocked that turn