one piece card game op-05 booster box Bandai Awakening of the New Era (OP-05) Japanese 4x Lot taking advantage of support cards One Piece OP-05 Awakening of

Well probably see this card show up a fair bit in more controlling lists

While you may think of activated abilities as something that cards on the battlefield use, like lands tapping for mana or planeswalkers using their abilities, theres actually no reason why we cant have abilities that activate from other zones

There are much better options for Commander decks that may want this for other reasons, though

You also need to watch if your creatures have taken lethal damage and an opponent can remove Darksteel Forge from the battlefield, either exiling it or putting it back in your hand, which will cause all your creatures to die to state-based actions