"Curse of the Shadow Prison" Rating Score by 備長炭18

The 9th term category-specific Field Spell has the impression that it was blatantly understated and broken, and this is the former impression.
The conditions for putting counters on him are pretty loose as if he was sent to GY with Shaddoll's effect, so it shouldn't be too difficult to accumulate.
Also, the number of magic stone counters x 100 is a bit unsatisfying, but it can weaken the opponent's monsters and improve the presence of Midra, which has a difficult status, so there is no loss here.
The last effect is the ability to remove 3 magic stone counters and use the opponent as a fusion material for his Shaddoll.
However, since there are too many removals, it is difficult to keep it, and since it is a condition to send GY by Shaddoll's "effect", counters do not accumulate in battle, and furthermore, there is a separate card that sends his Shaddoll to his GY. Since it is necessary, it also has the disadvantage that it is easy to rot in the first hand.
For that reason, the super fusion effect cannot be used as the main effect, and the weakening value is a bit of a troublesome card. The fact that it is not a Shaddoll name is also somewhat dissatisfying.