"Icejade Creation Kingfisher" Rating Score by みめっと

Icejade's "Union Monster, not a Union", and its effect specifications form a very strong synergy with Cosmocroa.
The equipped Icejade monster can attack while in the Defense Position and the damage can be calculated by treating the defensive power as ATK, so even a monster whose ATK has been reduced to 0 by the effect of the cradle can be used as an attacker, and the defensive power can be calculated. With 3000 Cosmo Chroir, you can defeat even monsters with over ATK 5000 if you don't have resistance due to the weakening effect of yourself and the weakening effect of Cradle.
It can also be separated and put into play as a 25 RBI monster in the same way as Union, and as a condition for that, his ATK monster must be on the opponent's field less than or equal to the DEF of the equipped monster, but when it comes into play, You can remove that monster by bouncing.
This is also a very useful effect for Cosmo Clore, who originally has a DEF of 3000, and his large monsters with ATK up to 3000, which are strong in battle, can be bye bye with this effect.
From the above, it can be safely said that it is a union exclusively for Cosmocroa.
However, the installation itself is possible for WATER monsters other than Icejade monsters, and unlike Union, it can be installed from the hand. It would be impossible to operate.