Go to the Tomb Keeper Camp and use the Fire Element Piece beside Lester to undo his curse. Then report to Garlandi.

Show Quest Info

Introduction

The Fire Element Piece has been found, now you need to use it to release Lester's curse.

NPC Dialog

Now that we have the Fire Element Piece, you can
use it to undo Lester's curse. Only you can get it
done.

Quest Completion

Lester's curse has been undone as well! Next, we
need to find the Earth Element Piece to undo Boto's
curse.