It untaps your lands to let you have explosive turns, or to combo
There are lots of MTG commanders that let you cheat equip costs (in fact Captain America, First Avenger does this too), and the go-to equipment here are things like Colossus Hammer
Cogsworth's ability can also come in handy, as it puts Hiram out of range of Maui
Cadira, Caller of the Small Cadira, Caller of the Small is an orc ranger that creates a 1/1 rabbit whenever it deals combat damage to a player
Come to think of it, though, what else would a combat-oriented blue battle card come up with that isnt recreated by another battle card yet anyway
One of the most popular formats to play is Commander, where you go up against up to three other players using a 100-card deck that's focused around one card as your commander