I dont quite think the value is there clearly enough in most decks
Returning a cheap creature with an enters or dies trigger to your hand makes paying two mana and two life seem like a small price to pay as you repeatedly drain lifedrain life, make tokensmake tokens, draw cardsdraw cards, make the table sacrifice creaturesmake the table sacrifice creatures, or worst of all, mill more cardsmill more cards to get better stuff back into your hand
We speak the dragons language of flame and rage
I wonder if the last three months of Hogaak prompted any of those memories to resurface with Feasting Troll King
Card Draw All the dungeon and initiative cards provide card draw of some sort, either small incremental advantages or actual cards drawn, but I did want to include a few other ways to draw more cards in the deck
Birgi, God of Storytelling is busted, Halvar, God of Battle is perfect for equipment decks, and Tergrid, God of Fright is on the Commander Game Changers list