pokemon booster boxs TCG: Sword & Shield Brilliant Stars 36 Count Box joined by Dragonite V Pokémon - Trading Card Game:

In essence, its a permanent Bother

There are other ways to power up a Dungeon deck: Safana, Calimport Cutthroat gives you valuable Treasure for mana acceleration, while the Dungeon Delver background turns up the benefits of exploration to an insane degree

Need something more comprehensive

I sought support for the theme

Finally, if the art box doesnt have a shadow underneath it, you may have a rare Shadowless card

(If they're equipped to the same creature, the abilities of the equipped creature will also trigger three times.) An ability of the equipped creature that triggers when a card is put into a graveyard "from anywhere" triggers twice only if (a) a creature card was put into a graveyard from the battlefield and (b) The Masamune is still on the battlefield and attached to the creature with the relevant ability