Even without all of these block mechanics, filtering through your deck (card drawing) for free each turn is very powerful, but combined with the nature of the block, it put the Looter way over the top
By forcing them to stay exerted, you also keep them vulnerable to additional challenges, making it far more risky for your rivals to use their characters with this card in your deck
I really do have to play this deck more
Deathless Knight will be hard to keep down for good with the incidental lifegain the deck has, and Elite Headhunter can sacrifice artifacts and creatures to shock pesky opposing dorks
The only downside is saying so long to some cards whose only wrong might be simply not being in the most recent set
In addition, the permanent 11 defense means this cant be broken by Drain Essence, without help, on your opponents next turn (which is a nice bonus over Great Horned Lizard, Gold Dragon, etc.)