Neslug (Final Fantasy X)

Neslug is an optional enemy in Final Fantasy X, bred in the Original section of the Monster Arena after at least one of each fiend roaming throughout Spira is captured. The design for Neslug, a hideously mutated snail, is only found here; hence making him the only true 'Original' monster. Neslug will attack with Megaton, which causes Confusion and Instant Death, and will also Lick one character for heavy damage. His Slime will hit all party members, inflicting Poison, Curse, Armor Break and Mental Break. After losing half his HP, Neslug will retreat into his shell and initiate Auto-Regen and regenerate massive amounts of HP. Do not summon Aeons during this time as it will make Neslug start regenerating over 100000 HP per turn. During this time he is also immune to Physical Attacks, leaving Ultima and Anima's Pain very handy. When he is down to 1,000,000 HP his shell will break and disappear. Wakka's Attack Reels Overdrive is a useful way to ensure victory.

Neslug will drop armor with Auto-Phoenix and weapons with the 1 MP Cost ability.