Oelm, are you kidding me? There were only 2 slots left, and he finishes off with a Logistics creature instead of an Earth creature? What if the Earth creature hadn't appeared in the remaining 2 slots? How would he have happily hopped around the map collecting loot after the nth number of failures?
It should be noted that the same wisdom didn't pay off at all; the Ghost was defeated without any Spell Power, and all the books were available in the Treasure.