The JPN vs ENG Price Premium (15-40%) Japanese cards typically trade at a 15-40% premium over English equivalents
You can only use each effect of "Blue-Eyes Abyss Dragon" once per turn, and can only activate them while "Blue-Eyes White Dragon" is on your field or in your GY
Yes, making stolen cards cost two mana less is good, but you already get a discount from Gonti
Now with Leyline Binding (a card that would be included easily in Top 5 white cards if it was printed in time) Unholy Heat, Mystical Dispute and other answers Omnath, Locus of Creation is not too difficult to manage, but you have to do it immediately otherwise a harmless fetch can generate a lot of value
Umbreon ex 60 As arguably the most popular member of the Eevee family, any Umbreon card carries high demand
It is pretty easy to play around and really has a lot less things that work well with it than you might imagine