Elemental synergy with Garruk's Uprising for trample and card draw, and Cactusfolk Sureshot for instant-speed aggression
Overall, Okidogi ex might be a bit slow to set up, but its damage potential makes the setup worth it
Check out the first five examples: Pact of Negation, Seasons Past, Sylvan Tutor, Shelob, Whose Lair is Death, and Abyssal Persecutor
The power to spend two counters from it to essentially draw a card is immense when it costs no additional mana, and the fact that you get +1/+1 counters for lands or spells is the cherry on top, or was it the keyword soup
ETB/flicker decks rely on their creatures to deal with artifacts/enchantments, so Torpor Orb could lock a deck like that out of the game