The Mightstone and Weakstone [The Brothers' War Prerelease Promos] Lightning[+30] Set: Tales of Aria Edition:

Set: Tales of Aria Edition: 1st Edition Finish: Cold Foil Type: Equipment Subtype: Chest Rarity: Legendary Class: Ice Cost: 0 Once per Turn Action - [1 Resource]: Cards and activated abilities cost opposing heroes an additional [1 Resource] this turn

At the beginning of that combat

then draws that many cards

Set: World Championships 2006 Type: Lighting Rarity: Ultra Rare

The Mightstone and Weakstone [The Brothers' War Prerelease Promos] Lightning[+30] Set: Tales of Aria Edition:Set: The Brothers' War Prerelease Promos Type: Legendary Artifact Powerstone Rarity: Rare Cost: {5} When The Mightstone and Weakstone enters the battlefield, choose one Draw two cards. Target creature gets 5 5 until end of turn. {T}: Add {C}{C}. This mana can't be spent to cast nonartifact spells. (Melds with Urza, Lord Protector.)