one piece flanked by legends booster box The red One Piece OP-06 TCG Flanked

Glaze Fiend is a 2-drop that buffs itself until end of turn when other artifacts enter the battlefield for you

Check out Bitterthorn, Nissa's Animus for the Phyrexianized version

They can fit into any of your Commander decks or can be a one of in your Vintage deck as Sol Ring is restricted in Vintage and banned in Legacy

Yes, dungeons are a special card type that never goes in your library and is initiated by specific cards

While she costs only three mana one red, one green, and one of any color because her saga sides final effect generates 10 mana spread evenly across all five of Magics colors, her color identity is also all five