Belt of the Triad Rictus

{p/b} When you are wearing this belt, you gain a +1
bonus to your AC.
{p/b} As an action, you can sacrifice -10 HP to cast
the spell "Thunderwave", using the DC of your spellcasting ability. Otherwise, the DC is 15.
{p/b} When you fall unconscious and drop to 0 HP,
the belt instantly teleports you to 50 feet of your original position. You can only use this feature
once per long rest.