~Princess flies on Horseback
I: Exile up to one target creature.
II: Target creature you control gets +2/+2 and gains flying until end of turn.
III: Return the exiled card to the battlefield under its owner’s control
That's a really interesting card. It can be the final one-two punch in an aggressive curve out, where they don't live to get there creature back. It can be a really slow blink or save from aura-based removal with some jump-pump attached. It can of course be sacrificed or bounced itself o they never get their thing back.
I hope we'll get multiple sweet sagas like this, where you want to prevent the last chapter from happening. That could turn Demonic Pact into a bigger theme.