Max, Azorius Exile

Players cannot attack you or planeswalkers you
control unless their controller pays {2} for each
creature they control that is attacking you

At the end of your end step, you may put a +1/+1
counter on a target creature an opponent controls. Creatures with +1/+1 counters on them that were
placed on them through Max, Azorius Exile
cannot attack you.