There aren't actually any rulings about how the player must perform the shuffle, meaning that they could theoretically conceal their shuffling completely and turn your opponent's blocking into a complete guessing game as opposed to trying to follow the shuffle around which might have been the intention of the card
Whack : Target player loses 2 life
The reason behind this is that if a land is ok, 2 might not be
This is going to make for some powerful plays
If the +1/+1 counters are more your thing, and Voltron is less important, Id consider switching the main commander over to either Grumgully, the Generous or Halana and Alena, Partners
As is tradition, all results are ordered by EDHREC score, only we'll go by the commander score on this one