Champion concept: Ghost Master
Passive: Fetter The Ghost Master doesn't spawn at the fountain; instead, whenever he respawns, he can select a location on the map. There, after a brief channel, a destructible philactery will be created. The Ghost Master gains a debuff (malus to CDR, vision radius, and skill power) that is worse the farther he is from his philactery. He is permanently invisible and untargettable, but cannot autoattack and can be killed by destroying the philactery. His emotes can be heard by the enemy team if nearby. The philactery can only be moved by the Golem (see below).
Q: Ginosaji Spawns a vindictive spirit, the Ginosaji, whose movement speed depends on the Ghost Master's own speed and distance from the philactery. It will follow one enemy champion, forever (or until recast/dispelled), dealing 1 point of true damage per hit. Grants vision. (cfr https://www.youtube.com/watch?v=9VDvgL58h_Y)
W: Clatterclaws Can only be cast on bushes, scales with AP. Spawns a ghostly spider, who immediately starts building a web. The web roots and damages the first enemy who enters it.
E: Golem Spawns a temporary construct using part of the Ghost Master's HP; scales with HP and AD. It is a minion, who acts as the Ghost Master's physical actor for jungling or farming (or fighting) (controllable similarly to Annie's Tibbers). It is the only thing able to move the philactery; while doing so, it is slowed and the Ghost Master is suppressed inside of it.
R: Darkling Can only be cast on the corpse of an enemy champion. Summons the Darkling, a murderous and violent Shadow who briefly Fears everyone nearby and immediately starts wreaking havoc on the enemy team.