Valentine Heartstop

you become immune to all damage for the duration of the spell. on casting, you may choose one effect:
your movement speed doubles

+2d6 to all damage dealt with a melee weapon

advantage on attacks made with a ranged weapon

once per cast, you may cast a spell level 2 or higher using a spell slot one level lower

if you choose on of these effects, you begin taking 1d6 necrotic damage every turn which bypasses this spell's immunity. when the spell ends, you instantly take the cumulative damage you ignored throughout the spell's duration