You can dump one or two things, you will get some value and you will have increased the synergy and power of your deck by playing this great card
It also helps in potentially lowering your opponent monsters ATK
Gishki has an auxiliary series of cards, known as "Aquamirror", which can be set in the End Phase after activating "Focused Aquamirror"
It is arguably currently the best supplementary engine for Stardust Bystial, due to its low engine requirements, synergy with Bystials, making them higher quality cards, and providing more win-conditions, with the additional Synchro access, especially to Loading
So, you can imagine my surprise when I came to learn that this card is worth simply because they misprinted (or ghost printed) the 1st edition stamp in the corner
I have also found a number of examples for more modern sets which will be discussed here in due time