Adding ephemeron option to sanowret-crystal

Manifesting an ephemeron gives 10-12 mindstates of arcana on a 2 hour cooldown. 

Unlike sanowrets themselves, there are no resource costs and basically no limitations (e.g., can be done in no-magic rooms and while remaining hiding/invisible).

To take advantage, you need to have an implanted crystalline fibril, at least 1 captured ephemeron, and an ephemeron specified in the "ephemeron: " YAML setting.

It's not a game-changer, but it can help train arcana while preserving concentration.

There's no benefit (short of personal preference, as they do usually show up in your LOOK) to using a particular rarity or ephemera type. Switching between types of ephemera doesn't change the cooldown.

It might seem a little counterintuitive to include ephemeron usage in sanowret-crystal, but I think it's the best way to do it. Manifesting an ephemeron right before the crystal check means you can occasionally skip needing to actually use the sanowret, saving some concentration.

sanowret-crystal.lic

@@ -19,6 +19,9 @@ class SanowretCrystal
     @no_use_scripts = settings.sanowret_no_use_scripts
     @no_use_rooms = settings.sanowret_no_use_rooms
     @force_exhale = args.exhale || settings.sanowret_force_exhale
+    @ephemeron = settings.ephemeron
+    UserVars.ephemera_last_use = Time.now() - 7200 if UserVars.ephemera_last_use.nil? && @ephemeron
+    check_ephemera if args.run
     check_crystal if args.run
     passive unless args.run
   end
@@ -74,8 +77,27 @@ class SanowretCrystal
     end
   end
 
+  def check_ephemera
+    return unless @ephemeron
+    return if Time.now() - UserVars.ephemera_last_use <= 7200
+    return if DRSkill.getxp('Arcana') >= 25
+    return if @no_use_scripts.any? { |name| Script.running?(name) }
+
+    case DRC.bput("ephemeron manifest #{@ephemeron}", /^You raise a hand to your neck, calling through your crystalline fibril/, /^That is not an ephemeron currently in your collection/, /^That is not a known ephemeron/, /^Try as you might, your imagination alone cannot conjure such mental figments/, /^You should stop practicing /)
+    when /^You raise a hand to your neck, calling through your crystalline fibril/
+      UserVars.ephemera_last_use = Time.now()
+      pause 5 # Make sure there's enough time for EXP to pulse before considering whether to use a sanowret crystal
+    when /^That is not an ephemeron currently in your collection/, /^That is not a known ephemeron/, /^Try as you might, your imagination alone cannot conjure such mental figments/
+      DRC.message("Could not manifest your specified ephemeron: #{@ephemeron}. Please check your YAML setting for 'ephemeron:'.")
+      @ephemeron = false
+    when /^You should stop practicing/
+      UserVars.ephemera_last_use = Time.now() - 7200 + 120
+    end
+  end
+
   def passive
     loop do
+      check_ephemera
       check_crystal
       pause 10
     end