Most collectors, I imagine, would go for shadowless over 4th print (UK/8th print/etc.) and when youre dropping significant cash on 4th print, you might as well go for 1st edition if you havent done it yet
Combat Research is a weaker version of Enduring Curiosity's effect, since it only applies to one creature, but also gives +1/+1 and Ward 1 to a legendary creature , providing a little protection for your commander
In-game, you will stack the Xyz monster on top of the cards tributed and, more often than not, can then use the materials to trigger certain card effects from the summoned monster
The Eevee Heroes set in the Pokemon TCG features artwork of Eevee and all of its evolutions, including Sylveon, Vaporeon, Jolteon, and more
1 Cyberdark Edge
Sharakusai" can be used as material for a Fusion Summon or a Synchro Summon