In addition to increased stats, all MvP monsters inside instances spawn with a special shield, that will act similar to Imperial Guard's Guardian Shield skill. Normally, monsters under the effects of such shield skills would be unable to receive status effects such as Comet's Magic Intoxication debuff or Dark Claw's debuff, whoever, all these effects will apply normally to the MvP shield and increase your damage to the shield.
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In addition to increased stats, all MvP monsters inside instances spawn with a special shield, that will act similar to Imperial Guard's Guardian Shield skill. Normally, monsters under the effects of such shield skills would be unable to receive status effects such as Comet's Magic Intoxication debuff or Dark Claw's debuff, however, all these effects will apply normally to the MvP shield and increase your damage to the shield.