Like most Pokmon cards, the value of Groudon-EX depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Primal Clash)
I won more than one old Vintage tournament that way with nothing in my deck more expensive than Jester's Cap, thanks to turn after turn of card advantage
You get an extra vamp token for every vampire you cast (even while it's in the command zone), consistent and recurring +1/+1 counters for all your bloodsucking minions, and the card itself has first strike and haste
Because Im normally getting two Altaria in play by turn 2, my Garchomp- EX can swing for 180 damage with a Muscle Band attached
When the teams put their moves into motion, its a total free-for-all
(6x Available, $20/ea, Can meet buyer!) All content is available to screen readers from the outset