Do tell me if my thinking is right here. If your hand is filled with mythological cards, Ravens, and low number attacker, would it be a good choice just to put those Ravens into your column so you will not lose action as your opponent attempts to eliminate your cards?
Also, does Raven defeat Shield Wall when play from the hand?
It's all about bluffing your opponent. Sometimes you don't have good cards to put down so you'll put down mythological cards just so you have more cards on the battlefield. Your opponent doesn't know.
No, you can't use Ravens to defeat Shield Walls.