Counter target spell. At the beginning of your next upkeep, pay {3}{U}{U}. If you don't, you lose the game.

{3}, {T}: Reveal cards from the top of your library until you reveal a land card. This artifact deals damage equal to the number of nonland cards revealed this way to any target. If the revealed land card was a Mountain, this artifact deals double that damage instead. Put the revealed cards on the bottom of your library in any order.

Scry 2, then draw a card. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.

Sunburst (This enters with a charge counter on it for each color of mana spent to cast it.) Remove a charge counter from this artifact: Add one mana of any color.

Whenever one or more noncreature permanents are returned to hand, draw a card. This ability triggers only once each turn. {X}{W}, Return a land you control to its owner's hand: Return target artifact or enchantment card with mana value X or less from your graveyard to the battlefield. Activate only as a sorcery.