Blood Moon (The Dark, 1994) This card has a quite simple function
Since Lumbering Falls cannot be targeted by spot removal spells like Abzan Charm, it will really make for a nightmare threat against control decks
Whenever that creature is dealt damage this turn, it deals that much damage to each other creature and each player
The Ability can prevent decks that dont have a means of cutting through it, like a Shred or Swift-style attack or a non-V or non-ex attacker, from taking any further Prize cards once Mimikyu is out
Teval, Arbiter of Virtue Teval, Arbiter of Virtue is much more balanced than it looks
Where TCGPlayer works for graded: If you're already a high-volume TCGPlayer seller with an established storefront and good feedback, listing your graded cards there alongside your raw inventory makes sense