While you wear this cloak, it magically projects an illusion that makes you appear to be standing in a place near your actual location, causing any creature to have Disadvantage on attack rolls against you. If you take damage, the property ceases to function until the start of your next turn. This property is suppressed while your Speed is 0.
Attacks vs you have disadvantage (until you take damage in a round).
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.