+1 me dio flojera leer todo y la skill es clara:
Requires you to have a JobLV of at least 50. It triples your HP and replenishes them (to the now tripled maximum), doubles your Damage, increases your ASPD by 30%,
increases your movement speed (does not stack with other increase except Peco Peco), gives the Endure effect at no further cost but halves your Flee Rate and sets ALL DEF AND MDEF to 0 for the skill's duration.
It also drains 5% of your current HP every 15 seconds. You cannot chat (chat mute), change equips, use any healing items or receive any heals while this skill is in effect.
You do not regain HP and SP naturally for 5 minutes after the skill ends (you can be healed or use items though). The Skill cancels out if your HP drops to 100 or below. Can be used during Guild Siege.
citemos la parte en la que dice: "You cannot chat (chat mute), change equips, use any healing items or receive any heals while this skill is in effect." Por lo tanto, no puedes usar el chat por mute, cambiar equipos, ni usar items de curación... pero si puedes escribir comandos como /effect es como descriminar @refresh, si estoy mal que me corrijan, saludos.