Charge of the Life Brigade

Imprint — When this artifact enters, you may exile an instant card with mana value 2 or less from your hand. , : You may copy the exiled card. If you do, you may cast the copy without paying its mana cost.

(: Add .)

Prevent all combat damage that would be dealt this turn.

( can be paid with either or 2 life.) Creatures can't attack you or planeswalkers you control unless their controller pays for each of those creatures.