hogarth wrote:
A buckler or light shield should be O.K.; they both say that you can hold something in the shield hand. Heavy shields, no.
Somatic asks for a "free hand" (ir order to do precise movements), and light shield description reads:
Shield, Light; Wooden or Steel: You strap a shield to your forearm and grip it with your hand. A light shield’s weight lets you carry other items in that hand, although you cannot use weapons with it.
So you have a free hand... but not free enough to use a weapon. Is it free enough to cast?