Necropolis discussions.

So, does magic affect ghosts, or is it also 50/50?

It depends on the spell. Where the damage is purely magical, it will affect them completely. But spells like "Magic Fist" have a 50/50 chance. Summoning the "Ashwood Swarm," "Unholy Word," and "Resurrection" won't work at all, just like spells that control the mind...