diff --git a/monster/beholder/beholder_leader_arc.arc b/monster/beholder/beholder_leader_arc.arc
new file mode 100644
index 000000000..7c4de70de
--- /dev/null
+++ b/monster/beholder/beholder_leader_arc.arc
@@ -0,0 +1,42 @@
+Object beholder_leader_arc
+name strange beholder
+randomitems beholder
+race unnatural
+face beholder_leader.111
+color_fg green
+anim
+beholder_leader.111
+beholder_leader.111
+beholder_leader.111
+beholder_leader.111
+mina
+monster 1
+sleep 1
+Wis 15
+see_invisible 1
+no_pick 1
+alive 1
+exp 2500
+ac 2
+wc 2
+dam 20
+Con 1
+Pow 2
+can_cast_spell 1
+sp 15
+maxsp 15
+hp 95
+maxhp 95
+level 11
+resist_magic 100
+resist_poison 100
+resist_paralyze 100
+resist_fear 100
+resist_physical 40
+speed -0.07
+flying 1
+weight 1000
+run_away 15
+attack_movement 1
+editable 1
+end