Ignition Resistance

Prerequisite(s): Crystal tiefling, total level 8 or higher

Through sheer will, you can briefly force your natural resistances to strengthen magically, shielding you entirely from that which you could previously only partially withstand.

Your Constitution score increases by 1, to a maximum of 20.

Whenever you take damage of any type you have resistance to, you can use your reaction to gain immunity to that type of damage until the start of your next turn.

You can use this feature a number of times equal to your proficiency bonus, regaining spent uses when you complete a short or long rest.