i need to find this Yaoi

Ok so the art of this yaoi is beautiful and i actually have a screenshot but i can't put in here, but The MC is blonde, Pale and with purple-ish eyes and the plot is that he was a commandant (I think, it's historical) and he was murdered and reborn with a completly new body in a new world and some god(?) saves him and the king takes interest in him bc of his powers that he can't control. Oh! And when the king takes his mask-off his appearance change (the same with the mc but when he loses control of his magic powers(?)