Senku Ishigami, Boy Genius

Whenever you cast an artifact spell, you get {e}
(an energy counter).
{t}, Pay {e}: Target creature gets +1/+0 and
gains trample and haste until end of turn.
{t}, Pay {e}{e}{e}: Draw a card.
{t}, Pay {e}{e}{e}{e}{e}: Return target artifact
card from your graveyard to the battlefield
tapped.