Egg

Ar tonelico Qoga: Knell of Ar Ciel Boss
Egg
エッグ (Egg)
(eggu)
Statistics
Difficulty
Difficulty
Level
Level
HP
HP
Attack
Attack
Defense
Defense
Easy
Easy
30
30
500
500
70
70
105
105
Normal
Normal
33
33
1500
1500
123
123
158
158
Hard
Hard
35
35
2000
2000
187
187
233
233
EXP	-
Leaf	-
Resistances
Fire	80
Fire	80
Ice	80
Ice	80
Wind	80
Wind	80
Thunder	80
Thunder	80
Physical	98
Physical	98
Poison	100
Poison	100
Paralysis	100
Paralysis	100
Curse	100
Curse	100
Song	100
Song	100
Location	XP Shell (Final Battle)
Class	Boss
Abilities	Suicide Bomber
Grade 4 Drop	-
Grade 3 Drop	-
Grade 2 Drop	-
Grade 1 Drop	-

These monsters are the minions summoned by Zzx_Ru, and while they have a rather pathetic HP and stats, this is offset by the fact that they are nigh immune to all forms of attack. This might not seem as much, but given their sole form attack, it will be a great of trouble during said battle: their attack is called Suicide Bomber, in which they self-destruct to cause a tremendous amount of damage to all characters around of themselves, and if they manage to reach your Reyvateil, you can be sure that this attack will instantly kill her. And to make matters worse, Zzx_Ru can continue producing more of these as much as it wants.

Therefore, the best you can do is trying to destroy them and keep them off your Reyvateil while you continue fighting Zzx_Ru, so you should try to end the battle as fast as possible.