The VOIDRUNNER'S CODEX is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
Shield-specific maneuvers might be good for fighters but atm I'd just allow you to sacrifice the shield to turn a critical hit into a regular hit - or maybe even halve the damage of an area attack.