Seymour, Hound of Peace

At the end of the turn, if no creatures you control attacked that turn, add a Pacification counter to Seymour.
Remove a Pacification counter from Seymour: Creatures your opponents control may not attack
you or a Planeswalker you control this turn.
Remove five Pacification counters from Seymour:
You get an emblem that says "Creatures cannot
attack you or a Planeswalker you control."