Chrono Trigger: Jets of Time

Lavos opens with a physical based AoE, then casts Chaotic Zone (the effect of which is randomized every seed, but is consistent with what the TerraMutant and Mega Mutant cast), and then a non-elemental AoE.

Lavos Inner opens with a powerful magic based AoE, and then both arms attack once each with very heavy physical damage, capable of killing any party member without earrings.

Can inflict chaos, stop, and poison, so bring status protection. Defeating one arm results in the other healing the head, disabling party members' status protections, and inflicting stop. It's highly recommended to kill both arms as fast as possible, ideally at the same time (note that they have different amounts of HP). Once both arms are defeated, the head casts Obstacle (same random effect per seed as Chaotic Zone), which lowers its defense so you can start damaging it.

Before casting its most powerful magic AoE, Lavos Inner will cast Flame Battle.

The Left Bit heals the Center Bit, and will gradually strip out the status immunities of the party. The Center Bit is the main attacker, and can deal very heavy damage. When it time warps, it will change its attack pattern, and can start a chain. This chain is broken after killing the Center Bit.

If the Center Bit goes down first, the Left Bit will start countering. Killing either the Center or the Left Bit will lower the Right Bit's defense. The Right Bit revives the others to full health, but its defense will remain lowered for several turns. If Lavos Core starts casting Invading Light, defeating either the Left or Center Bit will cancel the attack.