Withering should affect enemies as well as the player

Currently Withering only increases damage to the player when the player has intangible. Per jorbs, it should affect monsters as well as the player.

Question: https://discordapp.com/channels/329758756076519436/638465421598654496/709834014780948520

Jorbs answer:
https://discordapp.com/channels/329758756076519436/638465421598654496/709875121879253054