Like most Pokmon cards, the value of Magcargo 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 (Skyridge)
The mana value of a split card, such as cards with aftermath from the Amonkhet block, is based on the combined mana value of its two halves
Currently, on TCGPlayer , the card's market price is $205.55
For more Pokmon TCG content, check out our guide to the most expensive Pokmon cards ever printed, or see our list of all Pokmon sets in order.
Planeswalkers lower the value of traditional card advantage outlets (because Planeswalkers can do that for you) and hinder traditional aggro (because Planeswalkers inflate life totals)
Sure, I'm cheating, but I didn't want to have an objectively bad deck that never got its commander into play