variants Ability Counter can not be interacted with effects like Proliferate

Since the AbilityCounter have variable names, the ones that are not the basic ones (like Hexproof from White, that can be added by [[Indominus Rex, Alpha]]), they are not referenced as `CounterType`.
Proliferate like effects, using `CounterType.findByName(counter.getName())`, can not interact with them.

Note: This is all from reading counter related code, I'll test it live later.

Start by testing the reported case live, then inspect AbilityCounter and the CounterType.findByName(counter.getName()) lookup. Confirm that a non-basic ability counter such as Hexproof from White can be affected by proliferate-like effects; done means those effects interact with the counter correctly.

Written by the indexing model from the issue text.