Chainbreaker: rare, very strong original creature (twin-axe cleave, restless without fights)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lang/en.lang

@@ -341,3 +341,6 @@ set.render_scale = 3D resolution
 
 hint.pickup_prisoner_where = Prisoners can only be picked up on your own territory.
 hint.punch_where = The hand can only punch heroes on your own territory.
+
+unit.chainbreaker = Chainbreaker
+hint.chainbreaker_restless = The Chainbreaker is restless: it wants something to fight!