Its Cloud, Sephiroth, Lightning, Aerith dying like, you gotta have this stuff, right
Not only that, it deepens the value of Food payoffs like Greta, Sweettooth Scourge and Peregrin Took by letting me mingle them with existing sacrifice synergies like Blood Artist and Morbid Opportunist
Simic Sky Swallower / Sagu Mauler You can't win the game without dropping someone's life down to 0, unless you have a funky win-con or milling thing going on, but not generally
While not a powerhouse by herself, Auroras Protective Embrace ability grants Ward to all of your other characters, making it difficult for rival characters to take them off the board except by challenging
From memory Shadowspear was around five USD the first few weeks after THB released Because of its relevance in the Theros story arc, I think were mainly going to see it getting reprinted in supplemental sets or universes beyond sets because reprinting it in Amonkhet or Lorwyn would make little sense
Future Sight, Magus of the Future, and Bolas' Citadel are among the only cards that grant this ability