Wait, how does the "triangle" mechanic work? Is this basically just a split card? Or some kind of morph-type mechanic?
it's basically a split card, but where one side is a permanent, yes.
unless it turns out that both sides are "seen" in all zones(in which case you'd be able to loam these back) i don't think this particular card is vintage playable, though cards that are split card business/manabase will probably have impact across formats.