T11.1

A heavy, oily taste fills the air, the rotting corpse of a large rat sits in middle of the hall.

Searching the Floor
Perception DC 22: You observe a thin layer of sticky tar on the floor.

May burn the tar off, or make Acrobatics DC 20 to move across without being entangled in the tar, though at half speed.

If missed, target is entangled, and becomes susceptible to catching fire from any source of flame. If lit on fire, the tar burns intensely for 1 round; it deals 2d6 points of fire damage and is destroyed in the process.

From R11
You leave the sweet nutty smell of the larder behind, and as you walk along, you notice the air becoming cold.

From R19
As you walk through the empty tunnel, you feel the cold of the previous room leave you.