: Question about the big curse

Master's spells are divided into three categories:
1, a small curse... a regular spell.
2, the big curse... the effect is permanent.
3, curse ... the only unique (including the effect of perpetuation and easy to derive similar spells)
Because of the proposal of the book friend (the scenery of the end point), I will explain the big curse here.
The curse is a spell with a ‘big’ character in front of the spell's name, such as the protagonist's current ‘big scorpion’ and ‘big phantom,’ which also includes the ‘big blessing’ that other mages have. In the Masternet spell, as long as a spell has a big spell in front of it, it is not.
The effect of the great curse is permanent, meaning that it always exists.
For example, the warfare summoned by the Great Skull, it will not disappear when it is summoned, and it will not die physically. Even if it is crushed, melted into iron, or even heated into steam, it will not die. After naturally absorbing magic energy, it can automatically regenerate.
However, the scorpion is a summoning technique, and the temperance of the upper limit of the summoning (do not know the summoning can be seen in a single chapter, there are explanations). Similarly, Grand Phantom is also a summoning class with similar limitations.
the difference is.
The big phantom is copying, copying the phantom has the same attack power, but the defense (physical defense and magic defense) is 0 points, even the ants are bitten. Big Phantom can replicate creatures, mechanics, magical machine couples, pure attack turrets, and even explosive alchemy bombs. However, the copy cannot have the ability that the original does not have, such as copying the electric raft and the dragon, the electric cockroach will not spurt fire, and the dragon will not discharge.
What will be the original copy, what will be the phantom, including learning skills. For example, copying a mage, the phantom does not put his spells, only his body is strong and powerful.
In addition, the phantom can be used to hold the ice armor, but it doesn't really make much sense. It can shock the inside.
The permanent effect of the Great Curse will not be destroyed by physical damage. For example, the fireball of the Big Fireball will not be extinguished when it is immersed in the water. The effect of the great curse can only be eliminated by the mana, using energy to disintegrate the power of the curse. For example, the force is directly digested, or the fireball is extinguished with double ice, which is as effective as illusion.
The advantage of the great curse is the later.
Or, in the same period, the equivalent of the Master can not spell the curse. The same summoned 100 points of war, the little curse will die, the curse will not die, the difference between the two is too great. Therefore, the same level of curse is many times better than the small curse.
The power of the big phantom is more reflected in the 'sniper' and 'explosion'. Copying the sniper turret and the explosive tactics does not require defense. The more sniper turrets are copied, the greater the damage of a sniper. The same is true for explosive blasters...so it is also more advantageous to practice later.
The spells are targeted, and the curse is the same.
Give a simple example.
At this stage, the protagonist deals with the stone geek mage, using the big phantom, probably only one copy of it can be killed once. On the contrary, Lei Shi, a defensive mage, is difficult to deal with. For the pure defense master, slow, debilitating, cold and so on, the deceleration spell has a miraculous effect, you can turn the other into a turtle.
If you really don't understand.
Think of the Great Mantra as the 'halo of attack', because the halo is also permanent. Just similar, not the same, don't think about it.
(The above is also the proposal of Xiao Zhengtian's book friends, the author's bacteria explain here)
thank you all!