The Darkness, copied by Holomancer, will be awakened by the Candles of the original Darkness

[Jetz72]

Shown here, https://www.bilibili.com/video/BV1CA41187sA (5:11)

Presumably started due to the rework of the Darkness to be inline with the new Dormant mechanics in 17.0 (No longer has a separate card when Dormant. Uses the same card with an enchantment to track progress).

When the Darkness is summoned, it enchants itself with "Darkness Awaits" - LOOT_526e to act as the counter. When the copy gets summoned, the counter enchantment seems to keep the original owner.

Works for the Magic Mirror in Heroic too:

Log of this: https://gist.github.com/Jetz72/a7647fb3c170608f0ce484a1ab51dc35