Skitarii Ranger

Canticle (You may tap this creature. If you do, you
gain 1 counter of Maintenance, then trigger any
relevant Canticle effects. All counters of Maintenance
are sacrificed during each end step.)
Once you have 3 or more Maintenance
counters, draw a card.
{u}{u}: Reveal the top card of your library. If it is
an artifact, scry 3. Otherwise, put that card in
your graveyard.