Electric Kalo

You descend from a remote tribe in Kalo-Mahoi's photic zone that developed a bioelectric defense against predators, perhaps due to the influence of a bloom or because of an ancient diet of electric rays. You can cast the electric arc cantrip as a primal innate spell at will. A cantrip is heightened to a spell rank equal to half your level rounded up. If you cast this spell with only 1 target, you gain electricity resistance equal to half your level (minimum 1) until the end of your next turn.