The spell is not Boil Blood; it's BoilING Blood. Lucy also has it as fire. However, there are many classic posts suggesting that it's MR based. Not seeing any evidence of that, though.
But relevant to this thread:
"These lil spiders are pretty dangerous. Hittin between 84 to 104 in the higher hits thez cast a spell calles 'Boiling Blood' on u. The ways to get it off:
1.) Pumice stone - just revoes all u have of buffs .. newbee method.
2.) Metal wand - debuffs all u have. cheaper but also not sooooo good.
3.) cast dispell on urselves. u might hit it very fast and u will not need to recast all of ur buffs - cool method.
4.)
ask for regen. this spell immediatly clears it off. if u have regen running yet it doesnt protect u. professional method."
http://everquest.allakhazam.com/db/npc.html?id=3274