Rule 210.1 · Defense

Each battle card has a defense number printed in its lower right corner. This indicates its defense while it’s not on the battlefield, and it also indicates that the battle enters the battlefield with that many defense counters on it (see rule 310.4b).

Ask the judge Pro

The life counter has an AI judge that answers your play citing the exact rules. It is part of Gatewatch Pro; the rules, Oracle text and rulings stay free.

Open the judge in the life counterWhat is Pro