Very Mad Cow

Strategy
The Very Mad Cow has extremely high defenses, but can be killed by a mage with maximum creature/life/war. With 479 skill (majors, beer, housing items, focus stone) versus 591 magic defense, only about 1 in 20 spells will land, so this requires patience.

Kill the spawns until the Very Mad Cow appears. When it does, go into a corner and make sure you have at least two Mad Cows blocking you from the Very Mad Cow's attacks. Be careful not to kill these two. Now debuff magic defense, focus, self, and then fester and bludge vuln the Very Mad Cow. Attack with wars.

You may get teleported high above the Obsidian Plains, so try to stay healed. The drop can do 200-300 points of damage. Portal recall, get back into the corner behind two Mad Cows, and continue.

With luck, the Very Mad Cow will become bugged and just stand in the middle without attacking you. If this happens, you can switch to Tusker Fists and do massive damage.

If you have more than one mage, have the first get into position in the corner and then send the others in, one at a time, to jump into the corner and help.

Lore & Dialog
You give Master Arbitrator Very Mad Cow Token. Master Arbitrator tells you, "I see that you have proved you [sic] skill against the Very Mad Cow. Well done." Master Arbitrator tells you, "You shall be known to all as the "Mad Cow Slayer"." You've earned 10,000,000 experience.