(Today's creature was inspired by a Google+ post that pointed me to this piece of art at the Jaguar Combat blog)
No. Enc.: 1d4 (1d6)
Movement: 240' (80')
Armor Class: 5
Hit Dice: 5
Attacks: 3 (2 hooves, saw blade)
Hoard Class: None
At a distance, an Equusaw (EK-kwah-sah) may be initially mistaken for a Zunicorn (MF rulebook, page 104). But the loud buzzing that's heard when you approach one betrays this assumption.
For all outward appearances, an Equusaw is a horse with a constantly-running chainsaw blade sticking out of its forehead. An Equusaw is most usually white or brown in color, although other shades have been seen. Although a peaceful creature by nature, the Equusaw will attack if it's spooked or frightened. It attacks by rearing up and kicking with its two front hooves for 1d8 hit points each. It may also attempt to gore an attacker with its sawblade. This dangerous weapon will do 6d6 hit points of damage if hit.
What has yet to be determined is exactly how a biological creature can have such an unusual appendage. Some have speculated the Equusaw is actually robotic or an android in nature, perhaps developed for the Bygone lumber industry. Others feel that the Equusaw is a cyborg -- a horse with mechanical weaponry fused to its skull for reasons long-lost. Regardless of its ancestry, the Equusaw could be a valuable mount if caught and tamed, as they can be trained to defend their owner. But the act of catching and "breaking" an Equusaw has killed hundreds foolish enough to attempt it.