Is there a max # of cards that can go on a battlefield?
No, there is no limit to the number of unit cards that can be present at a battlefield.
According to Rule 169.6: "Any number of Units can be present at a Battlefield."
No, there is no limit to the number of unit cards that can be present at a battlefield.
According to Rule 169.6: "Any number of Units can be present at a Battlefield."