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That's extort

It is particularly potent in decks that care about Enter the Battlefield triggers or copying powerful utility creatures like Dockside Extortionist to generate a burst of mana before the mirror reverts to its reflective state

Seymour is another secondary antagonist in this game

Stuff like Snuff Out or Dismember are already heavily played cards, but here, you get to draw a card from them because you lost 4 life, and you also get to drain your opponents for 2 life, offsetting your life loss

The two are absolutely comparable, and Fateful Absence is, ironically, sure to stick around in decklists for a long time