I think Dictate of Erebos and Grave Pact are more important cards for Sacrifice decks, but if you have room for a somewhat similar effect, Eliminate the Competition is a great inclusion
Garp (OP16-075) and Smoker (OP16-028) fill the mid-cost Navy slots, holding the board through turns 3-4 before Akainu takes over the late game
Graded Population Report: Decidueye ex #8 Visualize the distrbution of grades in the chart
There are plenty of games where they come at you too strong and fast for the Orb to make any difference and would have been much better as anything else however in any game that is at all close the Orb will make a turn or twos difference and swing the game in its controller's favour
Although the creature dies at the end step, the creatures you cheat out with Through the Breach are often winning the game that turn anyway
God, this is going to revive so many Rhystic Studies, isnt it