friendly Necromancer

These would look like the Minecraft Dungeons Skeleton Necromancer but be a little different:

• Would glow blue instead of green to show that it is not hostile.
• Doesn't attack Villagers, Players, or any neutral mob. Only attacks hostile mobs.
• Attacks by using it's staff to throw soul fire at enemies, or using it for melee combat.
• It's staff can be used to conjure undead minions that attack the real undead and hostile mobs.
• It cannot be found in the Overworld, only revived by placing soul torches around it's spirit that you can find in old ruins.