src/map/skill.c
case SM_MAGNUM:
case MS_MAGNUM:
skill_area_temp[1] = 0;
map_foreachinrange(skill_area_sub, src, skill_get_splash(skillid, skilllv), BL_SKILL|BL_CHAR,
src,skillid,skilllv,tick, flag|BCT_ENEMY|1, skill_castend_damage_id);
clif_skill_nodamage (src,src,skillid,skilllv,1);
// Initiate 10% of your damage becomes fire element.
sc_start4(src,SC_WATK_ELEMENT,100,3,20,0,0,skill_get_time2(skillid, skilllv)); <----- Fire Element Enchant
if( sd )
skill_blockpc_start(sd, skillid, skill_get_time(skillid, skilllv));
else if( bl->type == BL_MER )
skill_blockmerc_start((TBL_MER*)bl, skillid, skill_get_time(skillid, skilllv));
break;
Its there in code, check your src.