Why is it only characters that have been swapped from traditionally or canonically white skinned descriptions that you care about, and why only now
Is it just a go-wide Goblin deck that can sacrifice extra tokens to cast new spells
Other than the silver ones, the color of the border (or the lack of border altogether), does not change the function or legality of a card, so its never a big deal
Yes, there will be Beginner, Intermediate, Advanced, and Expert step-up battles for the Mega Rising Expansion
You should only grade a card when its raw value is high enough that a strong grade multiplies it, usually above $40 to $50
The Initiate can gain counters on its own with training, and it can allow you to cash in your counters to destroy problem Artifacts and Enchantments