New kind of "trap"

[VeryAngryFelid]

All current traps encourage player to retreat and restore HP/MP, recharge wands, quaff cancellation for contamination/mark etc. and this is boring a bit IMHO. As a person who dies often while trying to reach a timed portal I think we can bait player into fighting monsters so that he/she can overestimate his/her skills and die (and have no one to blame but himself/herself). So this new kind of trap should give some benefit to player to make him/her feel powerful. At the same time player should still die so the trap should give some serious penalty also. To avoid luring monsters to the trap, it should be one-time only and activate instantly on being in view, no need to step on it. Quaffing potion of cancellation is still an option but player can think it is a bad idea because of buffs and seek to fight monsters instead. All effects expire at once and last about 40-60 turns.
Something like one of these effects:
1) Might, Agility, Noise(one time, not mark) and -Tele
2) Brilliance, Might, Slaying +5 and Slow
3) Invisibility, -Swiftness and -Tele
4) Torment (one time), Confusion, Ambrosia, Agility and Mark
5) Spectral Weapon and Mark
6) Regeneration, Noise (one time) and -Tele
7) Song of Slaying, Agility and -Tele
Basically pool of bad effects contains -Tele, Mark, -Swiftness and Slow, only these effects can kill player IMHO