Idea on how to bring back Sword of the Occult:
Upgrades from
(like Mejai's does from Dark Seal)
Cull's unique passive must be disabled to upgrade, and still must be done manually at the shop with additional gold greater than the bonus granted by the passive.
Adjust cull's unique passive to be completed at 50 CS and give half as much bonus gold.
Sword of the Occult has Mejai's effects in AD and grants physical damage healing (like Death's Dance does and shares the unique passive) at 15 stacks.
Might be worth considering to let them stack, but also reducing the effects of both items.
ono