Water/10th

Purge

At 10th level, your banes begin to wash away the enemy's resilience.

Any creature you have baned loses any resistance it has to one damage type you specify when you use your action to bane it.

When a creature you have baned makes a saving throw to halve the damage it takes, you can use your reaction to impose disadvantage on that saving throw. You must use this reaction before the d20 is rolled. The bane ends after the saving throw is made.