Amulet of Betrayal
Wondrous Item, very rare (requires attunement)
You can use a bonus action to move one of the following conditions from yourself to an ally within 60 feet of you: blinded, deafened, frightened, poisoned, stunned, exhaustion. When transferring exhaustion, move all your exhaustion levels. If the chosen ally is immune to a transferred condition, the transfer fails.
Source: Chains of Asmodeus p. 267