add level 4 fire

spells/Fire4.tex

+\spell{Festival of Fire}% Name
+  {\mFire}% Spheres
+  {Wax}% Action
+  {\detailed, \duplicated, \distant}% Enhancements
+  {\roll{Wits}{Vigilance}}% Resist with
+  {up to \spellArea\ fires, \spellRange\ away, explode in the form of dancing creatures, dealing \rollConv\ Damage to anyone nearby}% Description
+  {
+    The caster sings the Festival of Fire song -- an ancient elvish incantation about not being invited to a gathering.
+    All fires around \spellRange\ transform into dancing humanoids, spiralling around each other fast enough to tear themselves apart.
+    Anyone standing in the way of the dance receives repeated fiery lacerations.
+
+    Anyone hit by the flames takes \rollConv\ Damage.
+  }
+