Tales of the Valiant Players Guide (pg. 305)
2nd ring Arcane, Necromancy
A beam of enervating energy springs from your finger toward a creature within range. Make a ranged spell attack against the target. On a hit, the target deals only half damage with attacks that use STR until the spell ends.
At the end of each of the target’s turns, it can make a CON save against the spell. On a success, the spell ends.