Grading determines the quality of the card, and, while even a few points off perfect can be significantly less valuable, a graded card is always easier to sell and more likely to get higher prices than an ungraded one
Having a send effect similar to the Fusions is nice, but what makes it stand out is the fact that it can be used as any attribute which, since most of your cards are DARK but Winda is often somewhat underwhelming, is really nice since you can make Construct or, like above, Anomalilith which are normally better options
image1768906 102 KB vs 1st ed and disco image826382 41.4 KB For some reason, on the Mewtwo they seemed to be playing with different levels of opacity on the border
In that case, you change all of those targets to Hydroelectric Specimen
You can use that mana to activate Nivix Guildmages looting ability and get a spell like Banefire to kill off your opponent