Banner of Command buff idea

After the active has been used on a minion, said minion is treated as the player's pet: Holding down the banner's item number allows the player to control the minion's movements and attacks.

Stats wise, no change. But suddenly the item gets a ton more uses, and feels far more fun to play. Use your pet cannon from bot lane to help push mid, get that melee minion to check the bush for you/position himself to block the blitz hook. Grab a random minion from the lane and tell him to go help the jungler to setup a freeze in lane. Use a minion as a mobile ward/scout. Tell the cannon minion from mid to go stop the minion wave top from massing up while your team holds mid. CS in bot lane and top lane at the same time!

Because of the sheer versatility of the item it would become far more useful, yet it wouldn't be very good in teamfights compared to the locket. It's versatility is also tied to a 120 second cooldown, and so there's a lot of counterplay with the enemy team simply killing the promoted minion quickly.

It's a banner of command, let's command a minion. I want a pet caster, wouldn't you?