If there is more than one valid target for the Warrior tokens to attack when they are created by mobilize, such as planeswalkers or multiple players in a Commander game, the controller of the tokens chooses an attack target for each
Thankfully, you have this list of cards that are quite similar and span across every format
Folk Hero was the unique background printed to go with Burakos, Party Leader, but you can switch it up if you're so inclined
Support aggro cards like Adeline, Resplendent Cathar, Esper Sentinel, and Akroma's Will with your Elspeth planeswalkers
So fine, let's take this seriously for a moment
There isnt anything too fancy about this card, its all about giving your creatures a +1/+1 counter when they ETB