Lovestruck Beast

Once Lovestruck Beast is attacking, it'll remain attacking even if you no longer control a 1/1 creature.

If an effect copies an Adventure spell, that copy is exiled as it resolves. It ceases to exist as a state-based action; it's not possible to cast the copy as a permanent.

If an adventurer card ends up in exile for any other reason than by exiling itself while resolving, it won't give you permission to cast it as a permanent spell.