Theres nothing saying that Wilds of Eldraine cant push this mechanic further by adding adventures to other permanents like enchantments or even battles
Enchantment Discard (CTRL to add secondary) Drain Bloodchief Ascension At the beginning of each end step, if an opponent lost 2 or more life this turn, you may put a quest counter on this enchantment
This will also work if the creature Shellephant is in combat with has last strike
I think Lathliss will see the most play as part of the 99 of The Ur-Dragon, or even Zirilan of the Claw, though she also does fine as a commander
I wouldnt read too much into it, and it wont help you at a paper tournament or FNM , so approach it how you please
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