Hollow Heart was a special reward from the optional Colosseum Knight encounter in the retired Starlight Colosseum event. It allowed players to choose a Halloween-exclusive cosmetic skin.
How it worked
After the Colosseum Knight was defeated, surviving challengers who had landed at least three successful hits on the Knight qualified for a Hollow Heart.
Using the Hollow Heart opened a menu with four Halloween-exclusive cosmetic skins. The player could select one of the four as their free reward. The Heart was a choice reward, not a random item roll.
Availability
The Starlight Colosseum event ended in early November 2026, so its original Hollow Heart reward is no longer available through the event.