Gigantus, I Hardly Knew Ye
Rare8.3%Defeated the gigantus in a short span of time.
"In a short span of time" means killing the Gigantus almost instantly, and this is a one-shot scripted moment: during a late main quest a Gigantus lumbers toward a settlement and you get a narrow window to stop it. The reliable method is an Unmaking Arrow - have a bow equipped (or an archer pawn) and put one into it to drop it on the spot. Have the arrow ready before the quest triggers; miss the window and it's a New Game+ job. Mind your Unmaking Arrows though - they're scarce and you also need one for the Sphinx (346664773), so don't fire your last one here by mistake.