Five new rooms: prison, graveyard, guard post, arena, sacrifice altar; new creature: the revenant

- prison: captured heroes sit in cells apart from the torture chamber, do not defect and starve in time; the hand can move prisoners between cells and torture
- graveyard: the fallen are buried there; after a while some rise as revenants (undead: no food, no sleep, life drain from level 5)
- guard post: creatures hold the position and attack whatever comes into view
- arena: creatures spar in pairs for fast, free experience, at the cost of bruises
- sacrifice altar: creatures dropped on it are sacrificed; certain pairs bring a rare creature, otherwise a blessing (mood and mana)
- researched in the library, campaign unlocks, textures, furniture, texts EN/DE, bestiary

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

lang/en.lang

@@ -861,3 +861,36 @@ ability.inferno.name = Inferno
 ability.inferno.desc = its fire breath spreads much wider.
 ability.bomb.name = Bomb
 ability.bomb.desc = throws a home-made bomb that explodes among the enemies.
+
+# more rooms
+room.prison = Prison
+room.graveyard = Graveyard
+room.guardpost = Guard Post
+room.arena = Arena
+room.altar = Sacrifice Altar
+tool.prison.label = Prison
+tool.prison.desc = Captured heroes sit in cells here - apart from the torture chamber. Without torture they do not change sides, and hunger wears them down. Pick a prisoner up with the hand to move it to the torture chamber.
+tool.graveyard.label = Graveyard
+tool.graveyard.desc = The fallen - heroes and creatures - are buried here. After a while some of them rise as revenants and serve you.
+tool.guardpost.label = Guard post
+tool.guardpost.desc = Creatures hold the position here for a while and watch far: they attack every enemy that comes into view.
+tool.arena.label = Arena
+tool.arena.desc = Creatures spar in pairs: twice as much experience as training and free of charge, but they get bruised.
+tool.altar.label = Altar
+tool.altar.desc = Drop a creature on the altar to sacrifice it. Certain pairs of sacrifices bring a rare creature, otherwise the dungeon is blessed: better mood and mana.
+unit.revenant = Revenant
+job.guard_post = On guard
+job.spar = Sparring
+msg.revenant_rises = A revenant rises from the graveyard and serves you!
+msg.prisoner_starved = A captured {0} starved in prison.
+msg.altar_gift = The altar accepts the pair: a {0} appears!
+msg.altar_blessing = The {0} is sacrificed. The dungeon is blessed.
+best.revenant.lure = rises from the graveyard
+best.revenant.text = A revenant does not eat, does not sleep and does not complain - the perfect employee, if you can stand the smell. | It drinks the strength of those it strikes once it has some experience. The priestess and it do not get along, for obvious reasons.
+best.b.prison.text = Rows of cells. Heroes rot here quietly until somebody decides what to do with them.
+best.b.graveyard.text = Moss, stones and fresh earth. Nobody stays dead for long down here.
+best.b.guardpost.text = A brazier, a banner and a bored creature with sharp eyes.
+best.b.arena.text = Sand, sweat and the occasional tooth. Experience comes fast here.
+best.b.altar.text = Black marble that drinks. Some say it listens to pairs. Ogre and spider, mage and bat, jailer and priestess, kobold and cogling...
+ability.drain.name = Life drain
+ability.drain.desc = heals itself by a third of the damage it deals.