You have a creature card in hand that can be cast by paying ({0} magic symbol) due to Animar.
You control a nontoken creature that can be cast by paying at most ({1} magic symbol) due to Animar.
Steps
Cast any creature card by paying ({0} magic symbol) due to Animar.
Animar and Hullbreaker Horror triggers.
Resolve the Animar trigger, putting a +1/+1 counter on it.
Resolve the Hullbreaker Horror trigger, returning another creature that can be cast by paying ({0} magic symbol) due to Animar from the battlefield to your hand.