The bane of the drowned

An orb of sand, sea glass, water, and seaweed blast out of the casters hand (Note: only the Drowned can cast this spell) the target takes 1D6 damage and they make a strength saving on a fail the target is entangled and prone. On higher levels: At level 6 If cast on a tiefling or aarakocra said creature will turn into a drowned.