the vast majority of decks cant interact with experience counters, so even board wipes are only a temporary setback
While Snow Mercy only gives those creatures counters, you can use Snow Mercy to tab down those creatures, and the fun part here comes with how you activated that ability because you have to tap, then untap, then tap, then untap, then tap Snow Mercy
Trample and effects that say damage cant be prevented wont help them get through, and abilities which trigger on combat damage get denied
Whether Duress should see play depends on the specific strategy and meta of the deck, but it can certainly be a strong choice in the right context
Contents:100-card ready-to-play March of the Machine Commander Deck2-card Collector Booster Sample PackPlus: 10 specialty cards and 1 Foil-Etched Display CommanderDeck includes 2 Traditional Foils + 98 nonfoil cardsDeck introduces 10 MTG cards not found in the main setAccessories10 double-sided tokens, Life Tracker, special die, and deck box