Thanatos

Thanatos means "death" in Greek. He's often an evil god of same in role-playing settings, for instance Paul Jaquays' Caverns of Thracia.

Mystara Thanatos

Thanatos
A Scythe
Aliases	Tha-to, Karr, Old Nick, Darga, The Eternal One, The Grim Reaper
Alignment	Chaotic Evil
Divine Rank	Hierarch Immortal
Pantheon	Mystaran (Entropy)
Portfolio	death, entropy, destruction, decadence, corruption, the destruction of all life
Domains	Entropy, Chaos, Evil, Death, Destruction, Corruption
Worshippers	Nithians
Favoured Weapon	Scythe

Thanatos is the oldest and most powerful Immortal of the Sphere of Entropy in the D&D setting of Mystara. He hates all life and seeks its total destruction, but only on his terms and no one else's. He is constantly juggling various schemes and plans which he hopes will bring this goal to fruition.

Blackmoor Thanatos

Thanatos
Diseased hand grasping for the moon
Aliases	The Dark Moon, Withered Hand
Alignment	Neutral Evil
Divine Rank	Intermediate God
Pantheon	Blackmoor
Portfolio	Decay, disease, famine, time
Domains	Death, Destruction, Entropy, Time
Worshippers	Beastmen, disease and famine cultists, wizards
Favoured Weapon	Sickle mace

In the Blackmoor setting, Thanatos was once a wizard that specialized in the delivery of magical diseases. Using this knowledge, he created his own magical disease that managed to spread to Temrin, the god of time. The disease killed the god, but didn't spread further Sollus eradicated it, and Thanatos collected the dead gods power, using it to ascend to godhood, taking his portfolio over time, as well as disease and famine. Thanatos has since then been working on a way to spread death and famine to eradicate the "disease" that mankind is to him.