You can only control 1 "Worldsea Dragon Zealantis". You can only use each of the following effects of "Worldsea Dragon Zealantis" once per turn. During your Main Phase: You can banish as many monsters on the field as possible, then Special Summon as many monsters banished by this effect as possible to their owners' fields in face-up Attack Position, face-up Defense Position, or face-down Defense Position. During the Battle Phase (Quick Effect): You can destroy cards on the field, up to the number of co-linked monsters on the field.