Gurzigost

{3}{G}{G} · Creature — Beast

At the beginning of your upkeep, sacrifice this creature unless you put two cards from your graveyard on the bottom of your library. {G}{G}, Discard a card: You may have this creature assign its combat damage this turn as though it weren't blocked.

Motor: se resuelve a mano

Rulings (2)

If this creature is attacking a planeswalker, assigning its damage as though it weren’t blocked means the damage is assigned to the planeswalker, not to the defending player.
Wizards of the Coast · 2008-04-01
You decide how it will assign its damage at the time the ability resolves. This will be prior to actually assigning combat damage.
Wizards of the Coast · 2008-04-01