Lovely. Great synergy with buff cards, but works without them too.
How it works: unupped, it's 0/3. You use its skill on a graviton guard (3/5) and it is delayed by 1 turn. Next turn, you play a blessing on it and the warden becomes 3/6. Then you block the graviton guard again, which is delayed again but also takes 3 damage and becomes 3/2.
Oh, btw, here is the full picture if you can't make out anything (by Zanz):