Honorary Mention: Rahilda, Wanted Cutthroat / Rahilda, Feral Outlaw This mention is only honorable if you use the command zone on Arena, namely, in Brawl with it's Historic card pool
PSA 10 copies trade around $11348, roughly 12 the raw market price ($980)
Theres plenty of avenues to play with in the graveyard here
Every time a creature dies, it gains a charge counter, and then it pays you back at the start of your main phase with that much black mana
If each creature blocking it is destroyed during the first combat damage step, then all of the damage must be assigned to the defending player, planeswalker, or battle during the second combat damage step
You can attach this card to any Evolved Pokemon, but not an EX Pokemon