Complex sentence: When he encounter and fought Zick, he then grabs the key that suddenly destroyed that only a Tamer can hold it then the Hundred and First door was closing and starting to suck the lava back, he was perish by fallen in the lava.
Split into simpler sentences: When he encounters and fights Zick, he then grabs the key that is suddenly destroyed because only a Tamer can hold it. Then the Hundred and First door was closing and starting to suck the lava back; he perished by falling in the lava.