Wall Horse

Wall Horse
No. App.: 1d4
Hit Dice: 6
Armor Class: 5 [14]
Attacks: 1 (Hooves for 2d6)
Move: 16
Save: 13
HDE/XP: 4/240
Special: Cast Wall of Stone (80%) or Wall of Iron (20%) up to 3 times a day.

A huge, heavy dark horse encased in sombre blackened plate barding that hides nearly all of its features, the Wall Horse rarely consents to being ridden by anyone except the most stalwart of defenders or those serving a doomed cause, such as a city under siege by an army that vastly outnumbers their forces. A Wall Horse will canter through the streets of a besieged town and erect walls to help shore up the place's defenses without any guidance or counsel of those who are leading things. A riderless Wall Horse will often place its walls in order to give the defenders maximum freedom, but that is not always the most strategic option, so when a Wall Horse is spotted, generals and captains will often send out some of their best champions or troops in the hopes of capturing the beast and getting it to erect its magical walls where the commanders think that they'll do the most good. (Charisma can be useful...)

This is the second of four monsters we did in response to the Forge a Monster Challenge put forth by Noisms at this post: http://monstersandmanuals.blogspot.com/2011/08/forge-some-monsters-you-do-it-now.html.