Stim Pilot

Whenever Stim Pilot enters the battlefield or attacks, you get {e}
{e}: Stim Pilot gets +1/+0 and gains haste until end of turn.
{e}: Untap Stim Pilot
Whenever Stim Pilot deals combat damage to a player, you may pay {e}{e}. If you do, draw a card.
At the beginning of your end step, if you spent {e}{e} to activate Stim Pilot this turn, you may gain 2 life.
{e}{e}{e}: Stim Pilot gets +2/+2 and gains vigilance until end of turn.