It can do more than that, and if youre playing with counters in general its an appealing Manalith
Karumonix, the Rat King, and Lord Skitter, Sewer King are two Rat lords which help you swarm over every inch of the battlefield, and the classic Marrow-Gnawer has long since been a champion of Relentless Rats decks everywhere
Then, it has both trample and hexproof, ensuring that at least some damage is going to slip through your opponents defenses, and making it awfully difficult to remove outside of combat
And if you're willing to spend some big bucks then Id highly recommend Rise of the Eldrazi and Ugin, the Spirit Dragon, the two biggest upgrades for Kozilek
Art created by designer begins the card
This one costs six mana, but lets you look at the top six cards of your deck, grabbing a creature from among those cards and putting it directly into play