Gikou Taichi "Skill Lender" no Torikaeshi ~Toichi tte Saisho ni Itta yo na?~ - Vol. 7 Ch. 56

[MangaDex]

 

[realmacker]

4 days gone for nothing?

 

[Snailman32]

 

[HDMI1]

It's Kulve Taroth's lair.

 

[albirew]

♪I am a dwarf and i'm digging a hole, diggy diggy hole, diggy diggy hole♫

 

[0neDragon]

not only did they waste 4 days, they are also to careless

 

[Simpleton]

♪I am a dwarf and i'm digging a hole, diggy diggy hole, diggy diggy hole♫

That was my first thought - but pretty soon after that I saw that it's actually all a reference to Dwarf Fortress, and the area they now opened is an entrance to the Circus.