Add Valkyrie Holy Oil, to convert altars, given on an altar

gods/demihumans/valkyrie.trs

@@ -26,6 +26,9 @@ treasure Valkyrie
   more
   arch god_grace_limit_low
   more
+  arch valkyrie_holy_oil
+    chance 10
+  more
   arch god_grace_limit_medium
   more
   arch valkyrie_amulet_lifesave

gods/items/valkyrie_holy_oil.arc

@@ -0,0 +1,19 @@
+Object valkyrie_holy_oil
+name Valkyrie Holy Oil
+name_pl Valkyrie Holy Oils
+face valkyrie_holy_oil.111
+type 5
+level 50
+client_type 650
+nrof 1
+material 4
+weight 1500
+value 0
+msg
+This Holy Oil given by Valkyrie to her followers can be used to turn the altar of a lesser god to Valkyrie's Holy Altar.
+
+It should be used over the altar to convert.
+endmsg
+arch spell_consecrate
+end
+end