Felix Furs, Claws and All

Whenever you would gain any amount of {e},
you may pay {1}. If you do, gain that many +1.
Pay 2 {e}: Tap or untap target nonland
permanent.
{t}, Pay 5 {e}: Target player searches their library
for an artifact with converted mana cost 4 or less
and puts it onto the battlefield.
{t}, Pay 8 {e}: Gain control of target nonland permanent you don't control.