While it's great that Toski is very useful as a 4-mana Enchantment that says "Coastal Piracy is a Green card, now - go whine to Maro about your precious color pie" it also has to attack every turn
C Common Devouring Sarcoughagus X DARK Level 4 [ ZombieEffect ] ATK 0 DEF 0 When this card is destroyed by battle with an opponent's monster: You can take control of that opponent's monster, and if you do, it becomes a Zombie monster, also its ATK/DEF become 0
Where theyre actually from remains to be seen
While this may lessen the issues of the first problem fairly significantly, it ultimately takes away from the gimmick of the card
Giving you the flexibility of having card draw or a counterspell (and frequently, X for one is going to be enough) is quite strong
The copy that sold was just shy of the PSA 10 Mint rating, indicating the elusive "mint" Blue-Eyes White Dragon is worth even more.