Scott, the Oblivious Merchant

When Scott, the Oblivious Merchant enters the battlefield, draw a card.

{t}: Add 1 to your mana pool. Spend this mana only
to cast artifact spells or activate abilities of artifacts.

Whenever you cast an artifact spell, you gain 1 life.
—
"He may not know what he’s selling, but his wares
hold treasures untold."