Bonnacon

The Bonnacon from Asia. It has curled horns and emits burning dung.

There are reports of a wild animal in Paionia called the bonasus, which has the mane of a horse, but in all other respects resembles a bull; its horns are curved back in such a manner as to be of no use for fighting, and it is said that because of this it saves itself by running away, meanwhile
emitting a trail of dung which scorches pursuers like a sort of fire.”

Originally Posted by Raptorial of the Wizards Community forums.

On this Thread

An odd creature resembling a bison with inward-curling horns trots across the horizon. The hunters coming across the ridge bravely charge, but suddenly run in the opposite direction, leaving only one apparently brave young hunter. This bravery is shown as foolishness when the beast suddenly turns its back to the hunter, who erupts as a massive cloud of brown gas blasts out of the creature’s rear.

The bonnacon is an odd beast of the hills, resembling a bison with useless backwards curving horns. Its true weapon is in its rear end. When bonnacon are in danger, they will blast a massive cloud of flatulence that erupts into flame on contact with the air. The only time a bonnacon is away from its herd is a bull in mating season. When bulls get into their rut, they exude an even more noxious than normal stench around themselves. Leather made from bonnacon hide is highly prized, since the thick leathery skin is resistant to fire.

Bonnacon
Large magical beast
Hit Dice	4d10+23 (45 hp)
Initiative	+0
Speed	40 ft. (8 squares)
Armor Class	12 (-1 size, +3 natural), touch 9, flat-footed 12
Base Attack/Grapple	+4/+11
Attack	Stamp +6 melee (1d6+3)
Full Attack	2 Stamps +6 melee (1d6+3)
Space/Reach	10 ft./5 ft.
Special Attacks	Bum blast
Special Qualities	Darkvision 60ft., fire resistance 10, Low-Light Vision, stench
Saves	Fort +11, Ref +4, Will +2
Abilities	Strength 17, Dexterity 10, Constitution 20, Intelligence 2, Wisdom 12, Charisma 3
Skills	Listen +3, Spot +3, Survival +4
Feats	Great Fortitude, Toughness
Environment	Temperate hills
Organization	Solitary or herd (2-12)
Challenge Rating	3
Treasure	None
Alignment	Always neutral
Advancement	5-8 HD (Large); 9-12 HD (Huge)
Level Adjustment	–

Bum Blast (Su): As an attack, a bonnacon may release a 40-foot cone of fiery gas from its rump. Any creature caught in the blast takes 3d6 points of fire damage and becomes affected as per a stinking cloud. A Fortitude save (DC 30) negates the fire damage, but any creature caught in the blast that breathes is nauseated. This condition lasts as long as the creature is in the cloud and for 1d4 rounds after it leaves.

A male in rut produces a stinking cloud effect that is permanent. Creatures remain nauseated until the smell can be removed by natural or magical means (i.e. a bath taken, clothes watched, etc.). Magical items and metal items are unaffected by the smell. A delay poison or Neutralize poison spell removes the effect from the nauseated creature. Creatures with immunity to poison are unaffected.