It must be said, it's not immediately obvious how the word change affects Zevlor, Elturel Exile , simply because this is a complicated card with distressingly dense rules text
Ruins is generally better as it gets back Plating and Ravager but Stronghold gets back most of the things you want as well as some of the really spicy creatures like Welder and Disciple
Rather than writing everything out, using multipliers, and doing all of the stuff we do for the article, you can simply add up the total value of all the mythics in the set (in this case, roughly $115), divide by the total number of mythics in the set (generally 15 but sometimes slightly different Throne of Eldraine has 15, which would give us $115.05 / 15 = $7.67) to get the average value of a mythic rare, and then finally multiply by the number of mythics you'll get from an average box (here's a cheat sheet: the average box as 4.5 mythics, 31.5 rares, 108 uncommons, and 360 commons)
3/3 Card Details Set Magic Online Promos (PRM) Rarity mythic Colors G Artist Daarken Collector # 98061 Pricing TIX 1.64