You can easily make a game winning amount of mana for your deck from this simple tap from fueling an X spell like Jaya's Immolating Inferno or Exsanguinate to dropping stuff like Eldrazi Titans and Blightsteel Colossus and then equipping with Greaves and winning
I don't expect the final price will settle that high, but you get the picture
To see what other cards you have a chance of pulling, heres the Pokemon TCG Pocket Triumphant Light card list
Steel resists enchantment and cuts through delicate magic, which translates into Fairy being punished by heavy, armored decks
Earthbending's flavor hardly needs explaining, so instead I'll use this space to cheer about Wizards finding a way to make land-animation feel less risky, and airbending removes permanents, but only temporarily, depicting a creature away with a burst of air and reflecting the pacifist teachings of the Air Temple monks