It's a projectile :

that doesn't do any knockback (Getting hit by it won't push you away)

doesn't disapear if you enter in collision with it

and it does 30 damages per frame in base form and 40 damages per frame when you activate "queen in ruins" (one frame is one image, the game run at 60 frames per seconds, so if it does 30 damages per frame, you will lose 1800 Hp's if you stay inside of it for a full second)

Also if you activate both "queen in ruins" and "king of the mountain", in the god of hyper death state, glyph also get's way bigger and goes automically to the enemy slowly, and does 60 damages per frame

to make it simple it's similar to robot fire mecanic, you don't stay inside or you get burned really bad