So idk why I didn't notice this before and I'm basicly just checking to see if I'm right... Can I sac a {vampire hexmage} to remove the loyalty counters on a planeswalker and kill it?
Yep! Walkers are permanents with counters, so they can be targeted like anything else, then the walker will die, as a state-based action. It works fine!
Well then in that case with the amount of planeswalkers floating aroun in most standerd deck i don't understand why it's not Atleast sideboarded more often in black decks
If you are referring to modern black sideboards, *maybe*...
Double black casting makes it hard if black is not a main color in your deck
She was great when she was in standard though. Sac hexmage to destroy JtMS.
{Dark Depths} combo is pretty cool.
Could use {Hex Parasite} too