The DoomBrand in the Dread shade has a time lag before it is triggered.
My guess is that Doom brand node has the same triggering condition (for a fixed duration after casting) as the Frenzy phantom node.
All other nodes in the dread shade without this sentence have the node’s effect from the moment the dread shard is cast.
It is easy to check this lag with Volatile zombie using the Beyond Death node in the Dread shade.
The Doom brand works as a player ability, so it should be easier to check if you equip a weapon with an on hit effect.
※The lag occurs when activating Doom brand with or without Frenzy phantom.
※The same lag occurs not only for Summon Volatile zombie, but for other minions as well.
※The Summon Volatile zombie in the video has Dreadful zombie node, but regardless of whether or not it has this node, there is still lag when it activates the doom brand.