A1 - Dripping Jaws:

Attacks all enemies. Imposes three 5% debuffs [Poison] for 2 moves. Also, with a probability of 75%, it imposes a debuff [Leech] on 2 moves.

A2 - Leech disease:

Attacks all enemies. Imposes a debuff [Poison] of 5% on 3 moves. Instantly deals damage from all [Poison] debuffs to every enemy under the [Leech] debuff.

A3 - Blinding smog:

Puts a buff [Poison Cloud] on all hydra heads for 2 turns. This buff cannot be removed or moved.

Bloating [Passive]

Deals damage to all heads under [HP Burn] debuffs when that head is decapitated.

Almighty Haze [Passive]
This head takes double damage from debuffs [HP Burn].
Reduces the damage received by all hydra heads from AoE attacks by 10%.

Damage from skills, the scale of which depends on the opponent's MAX HP, cannot exceed 10% of the MAX HP of the head when attacking this head. The damage received in one tick from debuffs [HP Burn] cannot exceed 40,000 HP. Damage received from reflected damage, the skill of the military affairs master or the skill of the thunderstorm of giants cannot exceed 50,000 HP per attack.
Immune to debuffs [stun], [freeze], [sleep], [provocation], [active skills block], [passive skills block], [fear], [true fear, [poison] and [Petrification].
It is also immune to HP exchange effects, HP balancing effects, action time increase effects, and rev counter decrease effects.

No questions.

Video - Guide