14 wall for 5 recruits on a Common card? That's a LOT of wall gain, especially from a resource that generally isn't used for building. Generally, using an atypical resource for something should cost more, not less.
I assume that discarding a random card with an attack value was meant to be part of the cost, but in many cases, discarding an extra card from what has become a stale hand is a benefit in itself.
This card is far too advantageous as it is now. I'd dread seeing three of it in anyone's hand, a very real possibility for Common cards.