Trample (Ex): Rhyhorn can trample Small creatures or smaller. It deals 1d8+3 damage (for the sample Rhyhorn) and the save DC is 14. Stampede (Ex): When Rhyhorn makes a charge attack, it is practically an unstoppable force. Everything in its path can either step aside (if there is room to do so) as a non-action or stand there like an idiot. If they stand there, then they may make an attack of opportunity. If that doesn't stop the Rhyhorn, it gets a free horn attack and may attempt a bull rush as well. Acid Weakness (Ex): Rhyhorn takes double damage from acid, and gets pissed off.