[Agrajag]

The Dark Academy (D5)
A Leader may enter the Academy and persuade the mages inside to make him immortal by storing his viscera in their Academy and turning him into a lich.
The mages in the Academy have a 30% chance to agree. If the province containing this site falls under enemy dominion or is conquered by the enemy, all liches created in it, die. If the mages refuse to turn the leader into a lich, he dies. The leader-turned-lich retains all of his Experience, and all his magic paths (so he doesnt gain death magic), and he retains all of his skills that are not physical (So he loses... Trample, but not Heals, since healing is based on his acquired knowledge of healing).
Variant: Instead of being turned into a Lich (which sounds rather overpowered), the leader gains the Etheral ability (or dies, of the mages refuse!)