Messign, Erudite Peacemaker

Ward {1}
Messign, Erudite Peacemaker enters the
battlefield with a shield counter on it.
Creatures with shield counters on them can't
attack.
{t}: Move a shield counter from Messign, Erudite Peacemaker to another target creature.
Magecraft — Whenever you cast or copy an
instant or sorcery spell, put a shield counter on Messign, Erudite Peacemaker.