Guan Yangji, the Secret

Feigning strike (Prevent all combat damage dealt to this creature by creatures with strike abilities.) (Strike abilities include first strike, double strike, triple strike, and last strike.)
As long as you control no other legendary creatures, Guan Yangji isn't legendary. (The legend rule still applies.)
Yangji was only able to keep her identity as Guan
Yu's illegitimate child a secret for so long.