one piece booster box op11 OP-11 A Fist of Divine Speed Opening JPN One Piece God Speed

Though somewhat costly at six mana, this simple yet stellar green enchantment states that each of its owner's lands may be tapped in order to produce a treasure token

They only cost anywhere between one and three mana, and they'll stay on the battlefield until destroyed, bounced, or sacrificed

Whenever an opponent discards a land card, add to your mana pool

This can make you the de facto inevitability baron and make every long game basically approach impossible for the opponent

The process you're repeating includes that check at the end to see if it's a land, so if you've only got lands in your graveyard, you'd get them all back as tapped tokens

Untaidake having so many restrictions is indicative of how careful R&D can be when creating lands which produce multiple mana, though its an example of a card so thoroughly underpowered, that its essentially unplayabale outside of EDH and the Legendary Cube