Tiri

Tiri was an sun elf ranger who tried to assassinate Zog the Eldest in revenge for her massacred kinsman. She was originally successful in slaying the master necromancer when she jumped him in the middle of his ritual. But then had to stop the rampaging Scaull from destroying the world by climbing on its back and tiring it out. This distraction gave the orc necromancers enough time to raise their dark master into lichdom. who proceeded to shoot her while she was hanging on to the back of the foul tar behemoth, falling into the tar pit below. Tiri was then raised by Zog to become an undead tar monster who served him as his personal assassin.