Since he only costs one mana, you can play him early to begin your strategy and keep recasting him
It's hard to see that as anything other than a tacit acknowledgement that they know the cards are crap
This means it will try to use mana in your pool before mana sources in play, using colorless mana to pay the colorless part of the cost if any is available
You choose which player, planeswalker, or battle the Gnome tokens are attacking
What is clear, however, is the fact that this card is going to see plenty of play in Commander
Use your support characters to add damage while also granting full immunity to damage, and you are able to much more easily protect your characters through those early turns that are so vital to the success of hyper aggro builds like this