Casts 'Storm Blast', momentarily discharging a destructible power from the Rune Stone.

Generates a shockwave around yourself, damaging all surrounding targets within a 7x7 cells area while knocking them back by 7 cells.
The damage increases according to the caster's Rune Mastery skill Level and STR.

This spell has a variable cast time of 2 seconds and casting cannot be interrupted.

[iRO Description]
Deals strong damage to all enemies around (7 x 7 cell) the caster.
Damage increases as Rune Mastery level, STR, and BaseLv increases. Critical damage applies based on caster's critical hit rate.
Casting cannot be canceled by damage received.