Braids, Bound by Nightmares

Defender
When Braids becomes the target of a spell or ability, exile it, and return it to the battlefield under it's owner's control at the next end step.
Nightmare creatures you control have "When this creature enters the battlefield under your control, exile target nonland permanent an opponent controls with mana value less than the mana value of this card."
Whenever
{4}, Put four permanent cards with a total of at least four unique card types into graveyards from exile: Transform Braids.