As long as Warden of the Inner Sky has three or more counters on it, it has
flying (This creature can't be blocked except by creatures with flying or reach.) and
vigilance (Attacking doesn't cause this creature to tap.).
Tap three untapped artifacts and/or creatures you control: Put a +1/+1 counter on Warden of the Inner Sky.
Scry 1
(Look at the top card of your library. You may put that card on the bottom of your library.). Activate only as a sorcery.