Hi.
Some more ideas:
Bear Trap/Iron Jaws - works like that nasty metal trap used to catch animals by breaking their legs (metal jaws).
When Beethro steps into it, he dies. When a monster steps into it, it's stuck until killed. Standing on a square adjacent to catched monster is safe, but bumping into it - not.
Snakes simply ignore bear traps (alternative: they trample it, and it's destroyed).
Should goblins be dumb enough to fall for it ?
Electric Trap
Basically, every third creature (including Beethro) that steps into it, is killed. So it works like that: safe, safe, ZAP, safe, safe, ZAP.
The trap changes color/appearance so it's always possible to say if it's safe to step into it.
Waiting on the trap is dangerous, because it counts like entering it again.
Tombstone
Tombstones are best left alone. Each tombstone is inhabited by evil spirit. If Beethro steps into Tombstone, he's killed. Beethro can destroy tombstone with his sword, but it's not needed to finish the room.
Monster stepping into Tombstone destroys it, but becomes possessed by the spirit. So it permamently has its intelligence upgraded (like a brained monster).
More to come.
____________________________
http://www.gamasutra.com/features/20051128/adams_01.shtml