Mindful Rage

Gain the Ability the cast spells up to 3rd level while raging. After casting any leveled spell in this way, the caster must succeed a Concentration check equal to 13 + 2 times the level of spell (Cantrips are 0) or end the rage. This Concentration check can be attempted at advantage if the caster chooses to inflict 1d6 necrotic damage that cannot be reduced in any way. If casting a Concentration spell, at the end of each turn, this same concentration check must be made.