Robes of the Red Wizard

{e}If you aren't wearing armor, your
AC equals 14+ dex mod.
{e}You have advantage on saving throws
versus spells.
{e}Increase your spell save DC and spell
attack bonus by 1.
{p/r}Bonus action: you may sacrifice your
hit points to regain a spell slot, the hit
points lost must equal 4 times the level of
the spell slot gained.