If Archfiend of the Dross is no longer on the battlefield as its upkeep triggered ability resolves, use the number of oil counters it had the last time it existed on the battlefield to determine whether you lose the game
Meanwhile, Thanos can literally remove half of the board with his Power-up mechanic, a new mechanic invented for Marvel Super Heroes
If you do, target player loses 2 life and you gain 2 life
Well, because we can take their counterspell or removal spell for our threat for one mana and resolve our threat instead of spending a bunch of mana each turn to try to resolve a spell
I really like this stuff, because the combination of burn and removal, along with solid creatures give a powerful base to win the game with
Then, similar to how Mark Rosewater often drops hints for main sets, Verhey used the same style to preview some upcoming cards in the Commander decks