Complex sentence: Like Raiden, it is unlikely that he can ever be truly killed, since he is a god and thus immortal; if his mortal form is destroyed, he will simply reform himself, usually back in the Netherrealm where he was originally banished.
Split into simpler sentences: Like Raiden, it is unlikely that he can ever be truly killed due to the fact that he is a god and thus, immortal. If his mortal form is destroyed, he will reform himself, usually back in the Netherrealm where he was originally banished.