Shaman is the caster of Fire Nova not totem.

Signed-off-by: dr.skull <dr.skull@centrum.sk>

src/server/scripts/Spells/spell_shaman.cpp

@@ -125,7 +125,7 @@ class spell_sha_fire_nova : public SpellScriptLoader
                 {
                     Creature* totem = caster->GetMap()->GetCreature(caster->m_SummonSlot[1]);
                     if (totem && totem->isTotem())
-                        totem->CastSpell(totem, spellId, true);
+                        caster->CastSpell(totem, spellId, true);
                 }
             }