Whenever a creature you control attacks or a creature enters the battlefield under your control attacking, you may pay
![1](/Handlers/Image.ashx?size=small&name=1&type=symbol)
![Red](/Handlers/Image.ashx?size=small&name=R&type=symbol)
. If you do, you may put a creature card with mana value less than that creature's mana value from your hand onto the battlefield tapped and attacking.