Does Sion's shield absorb both physical and magic damage?
Sion's shield (like most other damage shields: Shen's, Janna's) absorb damage from any source.
Only Morganna's black shield specifies a damage type (in this case, magical).
Sion's shield (like most other damage shields: Shen's, Janna's) absorb damage from any source.
Only Morganna's black shield specifies a damage type (in this case, magical).