Giant footpad lizard
From Ardrana
The giant footpad lizard is an 8-foot-long, slender reptile with slate gray coloration and small ridges on its back. The lizard's body seems rather flat compared to other specimens. Long, spindly legs with long toes that end in round, sticky pads characterize this lizard. These pads, combined with the creature's agility and low body weight, make the footpad lizard an excellent climber. These creatures can cope with all but the smoothest surfaces at any angle up to vertical.
If captured and trained while young, footpad lizards can make excellent mounts or pack animals. Subterranean races such as Gnomes prize these giant lizards for their surefootedness in precarious cavern environments.
Note: The giant footpad lizard originally appeared in this form in the Mystara Monstrous Compendium Appendix for the AD&D game from TSR. Their use here is for the purposes of providing context for the campaign only.