I have the cd promo big 3 and two of them have the cosmo foil spilled onto the whole card, which looks just like the grey spots in your Lugia, mine shines though haha, Pretty cool if you ask me, however some collectors do not consider this to be an Error, I agreee to an extent but it clearly is a manufacturing default simply because its not supposed to be printed like that, therefore In my opinion it is a subtle error, Obviously there are much more intense errors such as base set Wartortle evo box error which will always prevail as a true error, The pokeball on zard looks cool, very unique 1 Like chinameowthsunflower April 10, 2017, 4:05pm 3 I always thought this was the norm for old japanese cards

Master Ball Mirror Pull Odds Per box : Exactly 1 Master Ball mirror card Total pool : 153 possible cards Odds of pulling a specific card : 1 in 153 boxes (~6.3M / ~$43,000) Odds of pulling a top-10 Master Ball : 10 in 153 (~6.5% per box) Odds of pulling Gengar OR Pikachu : 2 in 153 (~1.3% per box) This extreme scarcity is why the top Master Ball mirrors command prices that rival or exceed the sets Special Art Rares and why the Japanese version has no true equivalent in the English TCG
It's earned the spot
You can use Gisela, Blade of Goldnight to halve the damage you take while also doubling the amount of damage your opponents take from all sources
Since there is no duplicate card protection, someone who spends money will have access to more cards easier than a free to play player