First up, it gets dual lands, shock lands and triomes
cards as a resource, they cannot be placed beneath a character or another card
You can use the mana produced by Brotherhood Headquarters's last ability to cast a spell with freerunning even if you're not paying that spell's freerunning cost
This downside isnt too bad if youre able to meet the second part of the spell
If you have two cards in hand, one of which is Fire // Ice, and you become the target of an opponents Blightning, it wont be enough to discard just Fire // Ice
That said, some individual cards that just happen to be knightslike Bloodthirsty Conqueror, Imodane's Recruiter, and Moonshaker Cavalryare among the top-performing knights in competitive play, especially in popular Constructed formats