Tweaked Dread Bat's stats to match those of Vampire Bats as a unit line.

(i.e. race, movetype, resistances, etc.)

data/campaigns/Under_the_Burning_Suns/units/Dread_Bat.cfg

@@ -2,7 +2,7 @@
     #textdomain wesnoth-utbs
     id=Dread Bat
     name= _ "Dread Bat"
-    race=undead
+    race=bats
     image=units/undead/dreadbat.png
     [movement_anim]
         [frame]
@@ -12,7 +12,7 @@
         [/frame]
     [/movement_anim]
     hitpoints=33
-    movement_type=undeadfly
+    movement_type=fly
     movement=9
     experience=80
     advanceto=null
@@ -26,11 +26,23 @@
     [/advancefrom]
 #endif
     advanceto=null
+    undead_variation=bat
     cost=32
     usage=fighter
     unit_description= _ "Dread Bats are fast and can drain the blood of those they attack, thereby healing themselves, even to the point where they become stronger than they began the battle. Bloated with blood they have grown to a huge size and can feast on bigger and bigger victims."
     {DEFENSE_ANIM "units/undead/dreadbat-defend.png" "units/undead/dreadbat.png" {SOUND_LIST:BAT_HIT} }
     die_sound=bat-flapping.wav
+    [movement_costs]
+        cave=1
+        fungus=1
+    [/movement_costs]
+    [defense]
+        cave=50
+        fungus=50
+    [/defense]
+    [resistance]
+        cold=70
+    [/resistance]
     [attack]
         name=fangs
         description= _"fangs"