BloodFX mod from MercilessUO, place z_merciless_uo_bloodFX.pk3 in the same folder as AWE:UO to add extra blood
for the clients who have it installed.

For the full Merciless experience I recommend trying the excellent Merciless UO mod by Chris_P.

For more information about MercilessUO go here: http://www.mercilessmod.com/