Trinket-based Champ idea!
wayshrine = shrine possessed = host Mantle the Spirit Shaman Ranged AD Assassin Passive: Mantle gains 1 AD permanently for every 1 spirit stack he collects. Spirit stacks are permanent and can only be gained by Mantle.
Passive: Mantle can only purchase one trinket. His special trinket called a WAYSHRINE. Wayshrines grant vision of an area, have stealth, and have infinite duration. A wayshrine can take four hits. A maximum of 5 wayshrines can be placed on the map. Wayshrines are safe havens for wandering spirits, the wayshrines collect 1 spirit stack every 12 seconds and have a limit of 5 stacks. If an enemy champion is spotted by a wayshrine, the wayshrine will receive max stacks. If one wayshrine is in vision range of another wayshrine, the newest wayshrine will be disabled and unable to collect spirits or be the target of Mantle's abilities. Wayshrines can be upgraded at level nine to grant greater vision radius or give truesight of an area. Both upgrades are available in shop and cost 250 gold and have a new max of 10 spirits. Mantle collects spirits from his wayshrines when comes into vision range of them. Mantle cannot collect spirits from an enemy Mantle’s wayshrine.
Q: Spiritual Surge: Active: Mantle can target a nearby enemy or a nearby friendly totem trinket or ward. If an enemy is hit, it is stunned and takes magic damage. If a friendly ward is hit, it is upgraded into a basic wayshrine has its duration increased by 90 seconds, if it has one, or is given a 90 second duration if it doesn't have one. These wayshrines are not affected by the wayshrine map limit (so one can have summoned 5 wayshrines and still use this ability without affecting the other five). There is no limit to shrines created this way. All other wayshrine rules apply.
W: Shrine Call: Active: (Channeled) Mantle pulls the closest wayshrine directly to him. The The shrine has maximum movement speed and is not affected by terrain or structures. All enemy or neutral units hit by the shrine are slowed and take physical damage. Mantle can interrupt the spell to stop the shrine short of reaching him. (Mantle cannot target a specific shrine, it has to be the one nearest to him).
E: Shrine Caster: Passive: The distance that Mantle can place shrines is increased by 10% Active: Mantle rushes towards nearby target shrine.Mantle is not affected Terrain, structures, and other obstacles. This ability can be interrupted by hard cc.
R: Ultimate: Poltergeist: Active: Mantle targets an enemy or neutral unit and becomes a spirit that enters their body and possesses them. Mantle can move to different nearby targets a maximum of three times. Mantle can stay in this form for 7 seconds. The possessed is silenced and receives pure damage over time for the duration of their possession. Mantle has full control of the possessed. Mantle can end the spell prematurely by activating the ability again. When the ability ends Mantle leaps out and away from the host and deals pure damage, shreds the host's armor, and gains 20 stacks. Previous hosts are not affected by the spell ending. The possessed have a unique marker above their head that can only be seen by allies. Mantle's possession will be revealed to enemies for 2 seconds if the host is in vision range of an enemy ward or trinket. When revealed the host can be targeted by its allies and a basic attack from their ally will forcefully remove Mantle from their body ending the spell. The spell ending effects are not applied in this situation.