Heroic ICC Progression

[Gleancrawler]

Hello I have a query.
Will the heroic version of the bosses be available if the raid leader has killed Arthas in normal or will you require every raider to have killed Arthas in normal.
Basically will we be stuck killing him in normal a 2nd time if we have people in raid that where not in for the first kill?

[Linkk]

I'm too lazy to find the blue post about this, but if i remember correctly, they said it would be like TotGC where only one person needs to have unlocked the heroic versions in order to attempt them.

In short, only one person needs to have the full clear.