Big Lock Picking is a Legends of Idleon quest: 3 rewards. Defeat 400,000 Woodlin Spirits on a 2nd character, that must be what the big lock is all about!

Big Lock Picking | Idleon Toolbox

Defeat 400,000 Woodlin Spirits on a 2nd character, that must be what the big lock is all about!

Big_Lock_Picking

Hold down to gain EXP in the skill that's displayed in the corner of your screen. If you're in a town, you will gain EXP in the town skill. The amount of EXP you get is based on your skill's Lv.

Large_Experience_Balloon

Hold down instantly gain 6 Hours of Sneaking Progress! Applies to all your ninja twins, so it doesn't matter who uses this.

Sand_of_Time

Hold down instantly gain 4 Hours of Farming Progress!