The card costs around US$40.09
We have a four-mana kill spell in mono-Green (assuming you do it correctly, of course), then it pumps something, then it resurrects that same huge thing we used to kill the other thing
It is now the most expensive Pokmon card ever sold at auction
Metang allows you to rapidly flood your Pokmon with Metal Energy by pulling all of the Basic Metal Energy from the top 4 cards of your deck
It doesn't copy whether that land is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its types, color, and so on
Its special ability as a Radiant Pokemon makes it even more formidable in battle, with strategic advantages due to its rarity and high stats