(In reality, my number 1 is Xantcha, and Arixmethes is #2, but I've talked about her tons with two full articles dedicated to her, so instead, I give you my #2 here and then move everything down one spot.) And there we are
Immortal Obligation Immortal Obligation brings a creature from an opponents graveyard back under their control, but it comes with a duty counter that goads it
Through her stalwart leadership, she proved herself up to the whisperers' and spirits' expectations
Its got counterspells, lots of card draw, and Jace's Erasure to get the mill going
But its got a really low mana investment and is a strong ability once you get it rolling
Investment is seen operating on a timeframe of five, ten, twenty, even fifty years or more