Custom skill effect

[BerserkdGG]

Hi guys. I'm trying to add my own block buff feature with a few conditions (I want it to be fully customizable, so you will be able to choose from blocking ally, clan, or everything).
I'm stuck in the effect creation part, in order for it to work it has to be I need to add a new Enum constant into EffectType enum, which is not possible.
Any workarounds/ideas?

Thanks.