how do you fight him? i found this triangle for the first time yesterday but i just destroyed it without starting a fight with him, he just didn't reacted at all and i erased him from existence (i was playing with luminous drill + ping pong setup)
I don't know what the in-game idea behind it is but for some reason if you throw eggs at it (they can be empty/have anything inside), it awakens. You can see me chucking them at the start.
Any spell that is cast with an infinite lifetime will get you that message. Of course, the moment a spitter bolt hits a wall it disappears (more or less), but if you had something like a circular-arc modifier on it so it stayed in mid-air it would've lasted forever! So, still pretty neat.
the scaries moment i had is when i've found a hole in dense rock floor in the lukki lair, and when i got close a toothed spider jumped from it at hyper speed
The buff is just a flat ~+3200 damage per spell (before modifiers) so there is no real protection against it. For a spell like bouncing burst (3 dmg) it essentially gives you 1000x damage.
I think I tried it and it seemed pretty much the same, only difference being I have to actually sit there and click. With this I could just leave a rock on my "s" key and go afk