Rare Wondrous Item (Cloak) (Requires Attunement)
At the start of combat, after rolling initiative, you may choose a single enemy in your line of sight and issue an unspoken challenge. One of two following things then ensues:
Gambit Accepted:
The enemy accepts your challenge and gains a temporary surge of power against you. For the next round, their attacks against you have advantage, and you have disadvantage on all saving throws caused by them.
If you dealt more damage to the opponent than they dealt to you, the effects switch and you deal additional 1d6 damage each time you hit them with an attack for one minute
If they dealt more damage to you, the effect stays on you for 1 minute
If no damage is dealt, you both gain 1d12 Temporary Hit Points
Gambit Declined:
The enemy ignores your challenge and focuses on their defence instead, their AC against you increases by +2, and your attacks against them have disadvantage, but your critical range against them increases by 1 (critical hit on 19 or lower) and you may reroll your damage dice on each attack (one individual die, or all of them)
If you successfully hit your enemy at least 3 times in a row, they lose their beneficial effects, and yours remain for 1 minute.
You may use this cloak to cast Compelled Duel two times per day (DC 15)

[1st tier]Downloadable content

[2nd tier]Item Cards