These look extremely powerful, though we likely cant rely on them being creatures given that they automatically die in a few turns
Miara, Thorn of the Glade Miara is a daen, a packmaster of the Exquisite caste on the plane of Lorwyn
Far Corner's kami had taken one of their own, and they intended to repay the transgression in kind
Back way when, Wizards didn't really make sure that there were ENOUGH playable limited cards in the common slots for sets (no one was playing much limited before the inception of the Pro Tour, around the release of Ice Age ), so horribly unplayable cards like Snowfall and Balduvian Shaman glutted the common slots of packs - and commons are where most of the meat of your limited cardpool comes from
Of course, you can make Battle Angels of Tyr even better with a commander like Mondrak, Glory Dominus to double the myriad tokens