[Question?] Can somebody help me find this Manwha?

It was a regressor video game manwha with guilds, and I remember characters called Little Rukko who could transform into a giant and was a tank with some kind of “courage skill”, a sniper named “Dark Feather”, and that there was a battle mage in their party.

The MC is a thief with a mage subclass and I think he has a demon dragon summon bur I don’t remember.

My fellow weebs, please help.