From LEGO Power Miners (set 8962), a big friggin Rock Monster. (Thanks Holly and Brian).

 King Rock Monster and his crew

I command the very rocks to do my bidding! Arise, my minions!

 As far as I know, it’s the first time the Bionicle ball joints have been manufactured with plain old cap-and-tube bricks. Looks good. It’s poseable and playable.

 Behind every great Rock Monster, there’s a small, cranky sorceress.

Now, let us go forth and crush that fool Crystar!

 Looks like I need to work on my photography, though.