Quite a drop

[Ugramoth]

Blade of Chaos of Gondolin (6d5) (+12,+11) <+1>:
Dropped by a dark dwarven lord at 1350 feet (level 27)

+1 light.
Slays dragons, demons, trolls, orcs.
Provides resistance to dark, chaos.
Speeds regeneration. Grants the ability to see invisible things. Prevents paralysis.

[Ugramoth]

And replaced almost immediately:
Long Sword 'Coionden' (2d5) (+13,+6) [+9] <+3>:
Dropped by Ulwarth, Son of Ulfang, at 1350 feet (level 27)

+3 strength.
Branded with fire.
Provides resistance to acid, lightning, fire, nexus.
Slows your metabolism. Grants telepathy.

Playing a mage so I take telepathy over big damage. Also, High Elf so don't need see invisible and chaos attacks are rare at this level.

[Ugramoth]

OK, this just went beyond ridiculous.
Spear 'Gaurth' (3d6) (+12,+14) <+5, +1>:
Conjured forth by magic at 1350 feet (level 27)

+5 strength.
+5 dexterity.
+1 tunneling
Branded with weak cold.
Provides immunity to fire.
Provides resistance to lightning, cold.
Provides protection from confusion.
Grants the ability to see invisible things.

And the level feeling is 5-3...

[Grotug]

Treasure feeling is 3 because the game rates treasure feeling based on objects on the floor at the start of the level, not objects that chests and scrolls will produce. So ?Acquirement made a treasure feeling 3 (unless ?Acquirement was dropped by a monster in which case it was not part of the level feeling).