The Captain\'s but One sided

All Nightmares get +1/+1. , Pay 3 life: Put target creature card from a graveyard onto the battlefield under your control. That creature is black and is a Nightmare in addition to its other creature types. When Chainer leaves the battlefield, exile all Nightmares.

Changeling (This card is every creature type.) Creatures target player controls get +0/+1 and gain all creature types until end of turn.