We've been very wary of pushing the power level on extra-turns effects, which makes us hesitant to put them on rares that we want to be exciting
This, in turn, makes Elspeth Tirel a strong fit for the deck, and Miku, Divine Diva an even better one
It is a three for one not a two for one and can cost half the price
Keep in mind that the damage to the other players isn't combat damage, so it won't count towards Commander damage, but it does help keep everyone at an even life total to make taking them out easier
The idea is to ramp it out quickly (with exclusively land-based ramp to maximize its enters trigger), then flicker it to keep the board clear
It's also worth mentioning that there are other ways of assembling the one-shot kill on Turn 3