"Ice Dragon's Prison" Rating Score by カンベイ

It's hard to understand because the text is a little confusing, but the short story is roughly equivalent to the effect of selecting and excluding monsters of the same type in the opponent's field and his GY one by one.
There are a lot of non-targeted removals and his GY meta in OCG, but a card like this that is highly versatile (not a theme card) and doesn't have too many activation conditions would be extremely useful. is limited in number.
Due to its nature, it can be said that it is an effect that sticks in most designer theme decks that use GY even a little. A general-purpose card that can perform both the field and his GY meta at such a high level. The times have advanced.
However, it is not without weaknesses. Also, even if it is a theme deck, there is no guarantee that it can deal with the general-purpose S, X, and links that are often used for them due to the variation in races. If you misread the opponent's movement, there is a risk that you will completely lose the activation timing.
In addition, as already pointed out, the second half of the process is actually optional, so it can be treated as a trap card that simply steals the opponent's GY monsters. In the case of this usage, although it is limited to Special Summon monsters, Ouma no Toki, which does not negate the effect, is more powerful. If you just want to play the GY meta, Called by the Grave and his D/D Crow are much more useful.
It can be used as a material for the time being, so if you remember it, it might be useful.