My cousin and I have been farming him for a week and out of dozens and dozens of tries I've only ever seen one legendary drop that wasn't a slayer mod. --- http://i345.photobucket.com/albums/p368/DMan30464/gir.gif
In addition to his class mods, Terra can drop the following:
-Blood of Terramorphous (relic; 0.5%/sec health regen) -Hide of Terramorphous (shield; spike + roid + nova) -Teeth of Terramorphous (blue shotgun; shot pattern similar to jaws closing) -Breath of Terramorphous (-E-tech grenade mod; jets of fire in a wide radius) -Pitchfork (sniper; fires in a 5-round burst, eats 10 rounds per trigger pull if elemental) -His own set of green (I think) skins -His own set of purple heads
As you may have noticed, the drop rates on these are very, very low. --- If at first you don't succeed, try, try again. Then reload.
Yeah, I killed him 100+ times and only get a Pitchfork for my effort. Not a single head. --- http://img356.imageshack.us/img356/8325/scrunchface2copyfx0.png http://www.xboxlc.com/cards/default/alle5.jpg