Leviathan (Brave Exvius trial boss)

Leviathan is an optional boss from Final Fantasy Brave Exvius, and appears in the exploration dungeon Ruins of the Water God. She must be defeated in order for the party to acquire the power to evoke her.

Abilities
In the stage 'Ruins of the Water God' battle (1★), Leviathan is still mostly like her main story version: her repertoire of attacks consists of Water and Ice-elemental third-tier Black Magic spells, along with her Tsunami attack, and a self-boost to her own stats.

In her 2★ battle in 'Trial of the Water God', she is a formidable foe almost on par with 1★ Bahamut himself. Leviathan has eight million HP and can attack many times per turn, her actions dictated by whether she uses Protect or Haste.

If using Haste, it has a 20% chance each of using Stone Gaze (petrifies one unit) and Gigantic Tornado (modest magic damage to all units). Later it as his remaining actions he has a 40% chance of using Strike (strong physical attack and DEF debuff for 2 turns on one unit) and another 40% chance of using Mow Dow (modestly strong physical damage on all units), always checked in this order. If both fail, Leviathan follows with normal attacks.

If using Protect, it will also follow the aforementioned procedure, but substitutes Strike and Mow Dow with Waterga and Blizzaga (30% each) as his remaining actions, checked in this order. If both fail then he uses normal attacks. If Leviathan casts Waterga five times, he casts Flood which is slightly stronger than Waterga. If the total of Waterga and Flood equal 7 times, then he casts, Surge, raging waters which greatly buffs his MAG and can be fatal at the middle of his attacks. The turn after this buff is used, he uses Ferocious Current (weak magic damage to all units but debuffs Water Resistance by 100% for 5 turns to all units). The turn after that he uses Tsunami, which can lead to wipe with both things considered.

If below 60% HP, Leviathan has a 10% chance of using Sealing Foam in either skillset, which has a 10% chance of casting Stop for 2 turns to all allies. If Sealing Foam is used, regardless of whether it successfully casts Stop or not, Leviathan casts Bubbles of Rage (very high magic damage on one unit) the next turn. This move is absurdly powerful and is guaranteed to kill its target.