Guischard, Infantry defender

Guischard, Infantry defender can block up to
two creatures.
Other knights you control gets +1/+2.
Whenever an opponent attacks you or a
planeswalker you control, if you control a Knight,
you may put Guischard onto the battlefield from
your command zone blocking. If you do, other
creatures you control can't block this turn.
Then return Guischard to your command zone at
the end of combat.