obsidian flames booster box sealed Pokémon (15 Packs) Cards vary by pack. Obsidian Flames Booster Box Resealed?

Brass's Tunnel-Grinder / Tecutlan, the Searing Rift Brass's Tunnel-Grinder does a wheel effect, then just needs a little rummaging to consistently get to Tecutlan, the Searing Rift which adds a ton of value on mana spent for your permanents

A lot could have gone wrong on the way to The One Ring being sold too, which only added to its value

As long as you have Life Points to pay the cost, you could keep doing this over and over again

Ten most expensive Pokemon GO Trading Cards Mewtwo VSTAR Full Art Rainbow Holo #79/78 (Between $30-$40) Dragonite VSTAR Full Art Rainbow Holo #81/78 (Roughly $25) Mewtwo V Full Art Holo #72/78 (Between $20-$22) Mewtwo VSTAR Full Art Gold Holo #86/78 (Roughly $17) Melmetal VMAX Full Art Rainbow Holo #80/78 (Roughly $13) Professors Research Full Art Rainbow Holo #84/78 (Roughly $13) Candela Full Art Rainbow Holo #83/78 (Roughly $11) Blanche Full Art Rainbow Holo #82/78 (Between $10-$11) Spark Full Art Rainbow Holo #85/78 (Roughly $10) Ditto Reverse Holo #53/78 (Roughly $10) As you can tell, there are no cards on this list that are out of astronomically expensive