Voyager's Bane

Creatures have -1/-0 and magnitude. (Whenever a creature would deal damage equal to its power, it deals an amount of damage equal to the absolute value of its power instead.)
Voyager's Bane isn't a creature unless it's a token.
Eternalize {4}{u}{r} ({4}{u}{r}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a -4/4 black Zombie Serpent with no mana cost. Eternalize only as a sorcery.)