Grand King's Cero (A)
Grand King's Cero (A) is a Kido-type skill essence in VV: Ultimatum - an extremely rare drop from raids that drains 75 of your health each time it is used.
Grand King's Cero (A) is one of the chase items among skill essences. Community documentation describes it as an extremely rare drop from raids, possibly also obtainable from some bosses - the boss sources are unconfirmed, so treat them as subject to change per current documentation.
Its single documented mechanic is a steep one: using the skill drains 75 health from the caster. That self-cost frames it as a high-commitment nuke in the tradition of its Bleach namesake, though the actual damage, cooldown, Reiatsu cost, and requirements are not yet documented.
The '(A)' tag in its name mirrors the racial tags used elsewhere in the essence list - Kurohitsugi carries an '(SR)' tag and is explicitly race-locked to Shinigami - which suggests a racial restriction for this essence as well, most plausibly Arrancar. The documentation does not state this outright, however, so the lock should be considered unverified until tested in-game.

Details
| Essence group | Kido |
| Source | Extremely rare raid drop (possibly some bosses) |
| Use cost | Drains 75 health per use |
FAQ
Where does Grand King's Cero (A) drop?
From raids, as an extremely rare drop - community documentation adds that some bosses possibly drop it too, but that part is unconfirmed.
Does it really cost health to use?
Yes - the documented cost is a drain of exactly 75 health each time you use the skill.
What does the (A) in the name mean?
It is not spelled out in the documentation. Parallel naming - Kurohitsugi (SR) is race-locked to Shinigami - suggests a racial tag, likely Arrancar, but this remains unverified.