This is another card like Prophetic Prism, Alchemist's Vial, and Ichor Wellspring
Its wise to not read editorials for up-to-the-minute card prices, but as of this writing, which is only a short few months after this cards release, this Charizard has a market value of a bit under $900 according to websites that track stuff like that
So, heres what youll find in a Play Booster and what theyre for
However, if you have a black card with [Knightmon] or [DeadlyAxemon] in its name and the [Twilight] trait among the revealed cards and there are no other cards with [Knightmon] or [DeadlyAxemon] in their names, you can treat that card as your card with the [Twilight] trait and add it to your hand
Sometimes they work, and sometimes I get grades that make no sense
you may guess at a card you think your opponent might have in their hand or library if you'd like