How cool would it be if a Rinnegan user learns Edo tensei :They can. They still have chakra just like edo can absorb other's chakra they can get theirs taken too.
He'd be too OP and Sasuke knows edo tensei anyway since he saw Orochimaru use it.How cool would it be if a Rinnegan user learns Edo tensei :
He summons someone and then absorbs as much as he wants
Would be too OP it it's like Kabuto's ET they'll be able to use ET and absorb their chakra with little to no drain.How cool would it be if a Rinnegan user learns Edo tensei :
He summons someone and then absorbs as much as he wants
Alive Madara was able to absorb Edo Hashirama Sage chakras with no problem.Edos don't have a chakra flow system or tenketsu in thier body as this chakra infinity comes from out of nowhere and preta can only absorb chakra of the real world not from another dimension, if you haven't realized yet Edos are from a dimension called pure land, there chakra is in that land which is connected to the real world through a live sacrifice whose body energy is used as a vessel to hold thier soul in this world. That is why they've unlimited chakra, they don't have chakra circulatory system to give a limit to thier chakra.
Sage jutsu is limited, it's energy from nature.Alive Madara was able to absorb Edo Hashirama Sage chakras with no problem.