King Gram's punches are filled with rage and able to crush anything around. Inflicts 1992% damage on 1 enemy, breaks immunity, and inflicts 2770% additional damage. Enemies nearby receive half of splash damage with immunity removed and additional damage.
Punch of Rage contains mistranslations and might therefore be confusing. Here follows a wikia description of what the spell does: Punch of Rage Inflicts 1992% damage to 1 enemy, and removes invulnerability (not immunity) shields, when present. The damage can miss due to EVA and ACC, and damage must be dealt before the invulnerability shield can be removed. It is unknown whether the shield will be removed with a 100% chance thereafter. If and only when a shield was successfully removed from this target, the skill will then proceed to inflict another 2770% damage to that very target, as some kind of aftershock. This seems to be 100%. Regardless, if the first damage wave hits the main target, the skill will always deal 50% splash damage to all enemies around, whether the main target loses his invulnerability shield or not. The invulnerability shields from these enemies will definitly not be removed with a 100% chance; it is unknown what the probabilty is. Every enemy hit has his individual proc chance (although they seem to be tied together strongly). The splash damage that this skill inflicts will always be half of what the main targets receives. This means that the surroundings will also get dealt the additional damage (2770%) from the second-tier damage, as long as the main target did so.