Bosses

Last Breath Sans

Elevator endurance fight for Counter Bone.

Last Breath Sans in Unwavering Soul

Last Breath Sans: Elevator endurance fight for Counter Bone. Get it by Jump into the gap above the elevator button between the Lab and the CORE. Use it to Bring healing and practice the button. Final Last Breath is a later hole at 8 resets.

What is Last Breath Sans?

Hidden elevator fight. Normal attacks miss. Touch the FIGHT or Act button. One guide says 40 touches. Counter Bone blocks up to 3 hits on a 15-second cooldown.

Published facts

Last Breath Sans facts
FactValue
NameLast Breath Sans
LocationAbove the elevator button between the Lab and the CORE

How do you get Last Breath Sans?

Jump into the gap above the elevator button between the Lab and the CORE.

How do you use Last Breath Sans?

Bring healing and practice the button. Final Last Breath is a later hole at 8 resets.

FAQ

Last Breath Sans questions

What version is listed on the Roblox page?

The Roblox games record, updated October 29, 2026, lists game version 12.4. The description says the experience is based on Undertale by Toby, names creator YaoYN, and links the YN Studio group. That record does not include an itemized patch note.

What do you need for a standard reset?

Two public descriptions disagree. A game reference says the barrier's final room accepts a reset at level 6000 with 70 TP, then wipes level and TP and applies a level booster that can stack to 34 percent. A November 2026 walkthrough instead says level 6000, 100 TP, and a gold fee, and that weapons stay. Check the barrier prompt on your save before you spend the run.

How do you redeem a code?

Open Menu at the top right, then Settings, type the code into the box labeled Code here, and press Redeem code. Current code lists say the account must be in the YN Studio group. Codes are reported as case sensitive and single-use per account.

Where do skills come from?

Community guides say you need level 6000, then spend 100 Kromer per spin at Ralsei's Skill Awakening Workshop in Castle Town. Upgrading a skill you already have is described as another 200 Kromer. The Extra capacity pass adds 18 skill-storage slots.