Strange message

[MC Hammer]

So i was playing the game and on 2 cycle 1st floor there was wierd message
[WARNING] The ground begins to shift beneath you..
Also strange that only enemys was small beetles and big ones.
Is this kinda Kin artifact from RoR1?

[Darc Vader]

Yeah, it’s a rare event that can happen with most enemy types. On top of the beetle one there are:
The ground's temperature begins to rise = Lemurians + Elder Lemurians
The air begins to burn = Lesser and Greater Wisps
The earth rumbles and groans with mysterious energies = Golems and Titans
A tear in the fabric of the universe = Imps and Imp Overlords
The air crackles and arcs = Jellyfish and Vagrants

[Shurenai]

Yeah, As Darc says, there are a number of events that cause the level to spawn specific enemy sets. It basically is, as you guessed, the equivalent of the Kin artifact from ROR1.