Is There a Yeti?

Caleb: "Can anyone cast invisibility on me? Yes, I can" Jester: "I'm just going to be a very little bit slow. If we're leaving the present at the bottom of the shaft, then it doesn't matter." Caduceus: "We'll bring the spider, leave it, make some noise, like, ahhhh! And then we'll leave" The group heads further into the cave and finds themselves in pitch-black darkness with no light or vision. Caleb casts Mage Armor Mine so he can protect himself from any traps that may have been set by the dragon.