Ghalta, Primal Hunger Ive seen this creature be cast as early as turn 3 or 4, and I can imagine some play patterns allow you to cast it even sooner
Nosh , , Sacrifice this artifact: You gain 3 life and draw a card
Rogue's Passage and Whispersilk Cloak are commander staples for a reason : They'll make sure your Orc Army keeps getting through and giving you those draws
But best of all is casting Rift at your opponents' end step, denying them the ability to replay their permanents and possibly also forcing them to discard down to hand size
It wont hit creatures, but if the primary threat is counterspells, Duress does the job
Its ability to create Faerie tokens can be powerful in the right deck, especially if you can consistently trigger its ability multiple times