Flying When Arcanist's Owl enters the battlefield, look at the top four cards of your library. You may reveal an artifact or enchantment card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
Flying Modular 3 Whenever another artifact enters the battlefield under your control, target creature an opponent controls gets -1/-1 until end of turn.
At the beginning of your upkeep, you may put a +1/+1 counter on target creature you control. At the beginning of your upkeep, you may put a charge counter on target permanent you control.