Chien-Pao, Sword of Ruin

Double strike
All other creatures lose vigilance and can't
have or gain vigilance.
When Chien-Pao, Sword of Ruin is blocked, you
may pay {2}{u}. If you do, prevent all damage that
would be dealt to Chien-Pao this turn. The
blocking creature gains indestructible until end
of turn and is tapped.