He requires blood to be spilt in the form of opposing life loss, however, so he will need to make sure cards in his deck will facilitate this
Treetop Sentries: The squirrels where I live already hunt down chicken wings, so seeing squirrels with bows and arrows makes me very uncomfortable
These cards, while polar opposites, synergize in fantastic fashion, allowing their controller to consistently draw a minimum of two extra cards each turn, as long as both commanders are in play
We cannot guarantee any specific design
This is vital, as giving trample to our creatures allows them to punch through blockers and draw us more cards
Notably, this means other players can't try to remove Elves from the battlefield after you activate this ability but before it resolves