Some in-game data RealmEye based its statistics on are not available.
This includes most character stats and exaltations.
Services based on such data are not updated.

Cloak of Ghostly Concealment

Cloak of Ghostly Concealment An eldritch cloak of the afterworld which grants invisibility by enveloping its user in death itself.

Tier 6
MP Cost 85
On Equip +5 SPD, +5 DEX, +20 HP, +20 MP
Effect(s) Invisible for 5.5 seconds
Cooldown 6.5 second(s)
XP Bonus 6%
Feed Power 380

To chain cloak using the Cloak of Ghostly Concealment, you need at least a level 64 magic heal pet (6.72/s), assuming your rogue has maxed wisdom.

Before Patch X.32.7.0 (Feb 2020), this item had a stat bonus of +5 SPD, +4 DEX, +2 VIT, +2 WIS.