Ori, the Younger

When Ori, the Younger enters the battlefield, he deals 1 damage to any target.
Brotherhood with Dori, the Elder and Nori,
the Tinker (If you control either Nori or Dori,
then Ori gets +1/+1, if you control both then Ori instead gets +2/+2; you may have multiple commanders if they are all in a brotherhood.)