Like most Pokmon cards, the value of Terapagos 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 (Prismatic Evolutions)
Meathook Massacre: Finally, Meathook Massacre is arguably better than its recent sequel, not only being a board wipe with the right mana but also giving you health and ping enemies for damage with every creature that dies
It can also buff itself to an obscene degree
You can send this face-up card from your Spell & Trap Zone to the GY
This is perfect if you have some mana abilities that you want to exploit, or if you just need to get an Artifact or Enchantment off the board
Dont expect the less playable cards to maintain such a high price point, however