This has, consequently, reignited commercial interest in the game
Other prominent mechanics that incorporate (or freely enable) sacrifice include: Food, Clues, Treasures, Sagas, Unearth, Encore, Evoke, any other temporary tokens such as Faerie Artisans or Hostility, cards with Upkeep, Quests, Exploit, Casualty and now Bargain
Coming in a set with abilities like Bargain that already incentivize sacrifice, Korvold can frequently catch opponents off-guard by appearing or re-appearing earlier than expected
Ruric Thar, the Unbowed absolutely chunks anyone foolish enough to cast a non-creature spell (including you, but thats the Gruul way)
Pia Nalaar will give us four energy when we hit opponents
You don't have to go far down Oloro's EDHREC page to find out it's a popular addition to the deck, especially if you're checking out the "lifegain," themed decks