I actually haven't thought of that, but the only thing that would actually fit the setting would be for you to end up with an out of control summoned creature. So you better get out of there once the spell's over!
Either get gone, send it away, or go the devil route and get it to "give" its corpse to you. Regardless, not fighting one even if I have magic weapons to actually damage the thing! Both elementals and demons are very scary for a solo like me. No wonder the spells take so long to cast.
