Olivia, Crimson Bride Olivia, Crimson Brides reanimate ability is high risk high reward since both Olivia and the reanimated creatures have to attack
Derevi, Empyrial Tactician While Derevi, Empyrial Tactician is best known in cEDH circles for its Stax builds (and as someone who has had their resources completely choked out multiple times this way, its reputation is well deserved ), the ability to tap or untap a permanent when it enters the battlefield also offers a lot of opportunities for abuse
Then the second ability works perfectly with Omo, Queen of Vesuva given the Everything counters she gives out
Tifa Lockheart even has the potential to see competitive play in some hyper-aggro strategies, which could make her even more desirable
Thats a little more than youd pay normally when you look at Deadly Dispute and Fanatical Offering, but this basically draws three cards since you get the land, and it gets all your death triggers rolling