Flying, haste Whenever you cast your second spell each turn, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

{T}, Sacrifice this artifact: Exile target player's graveyard.

When Urza enters, create a 0/0 colorless Construct artifact creature token with "This token gets +1/+1 for each artifact you control." Tap an untapped artifact you control: Add {U}. {5}: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.

Enchant creature Enchanted creature gets +1/+1 and has menace and trample. When this Aura is put into a graveyard from the battlefield, draw a card. Plot {R} (You may pay {R} and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Counter target spell unless its controller pays {3}.

You can't cast Jace Reawakened during your first, second, or third turns of the game. +1: Draw a card, then discard a card. +1: You may exile a nonland card with mana value 3 or less from your hand. If you do, it becomes plotted. −6: Until end of turn, whenever you cast a spell, copy it. You may choose new targets for the copy.

Discard your hand, then draw four cards. For each card discarded this way, creatures you control get +1/+0 until end of turn. Plot {3}{R} (You may pay {3}{R} and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

Metalcraft — {T}: Add one mana of any color. Activate only if you control three or more artifacts.