(skill, 25 seconds cooldown. Pure
)
This bundle of crystals is vibrating so violently it almost looks like it's angry at you. Adorable.
"Releases a small explosion around you; if used within 2 seconds of getting hit, the explosion deals a critical hit, is much larger and deals more damage depending on the damage you took."
The normal base damage is 100 and explosion radius will be about Infantry Grenade's radius around you. If you use the Rage Core within 2 seconds after getting hit, the explosion will be slightly larger than Rhythm n' Bouzouki's final critical hit.
As for the damage in that scenario, the base damage (enemy attacks have base damage too) of the hit you took times 20 will be added to the normal base damage of the skill. So, if you got hit by an attack with 10 base damage, like a Zombie's basic melee, that'll add 200 damage, meaning you could use the Rage Core to deal 300 base damage total.
This is a pretty fast skill in terms of use time, but not instant so you won't be able to pop it during a roll like you can with the likes of Blade Dance.
This doesn't get activated by DoT effects. If you got hit more than once 2 seconds before using the skill, it uses the higher base damage attack to calculate its own damage.