Oswald, Pardoner of Velka

When Oswald enters the battlefield, create Book
of the Guilty, a legendary colorless artifact token
with hexproof and "Whenever a creature deals
combat damage to you, note its name."
{2}, {t}: Until end of turn, Creatures noted for
target permanent you control named Book of the Guilty can't block and get -1/-1 for each time
they are noted.