I think the challenges need an "easy mode".

Mostly because of how time consuming they are. I want to use some of the cards that need unlocking, but unfortunately, I haven't even been able to beat the first challenge, despite putting a few hours into it. I remember beating it before taking like, a year off from the application and messing up with updating (made a new folder and got things working), but unfortunately there's a lot of luck involved when the opponent starts with 9 power total or a 7/7 on the field.
And even if the earlier rounds aren't overly difficult, it takes a long time to get through the first 8 duels, especially since you can't just bust out a fast red deck and try to make a quick kill every time. Mostly I look for a lockdown first, THEN a win condition. Or if I'm using a turn 2-3 kill deck with Tendrils of Agony, there are tons of cards to go through before tapping 2BB with 10 spells already played.
So...yeah. I do enjoy the challenging part of it, but for simply unlocking cards, it's not overly fun to get 8 rounds through then see a bad hand and an even worse when after taking a mulligan. I wish we could earn continues with consecutive wins so that when we do make it to the harder matches, we have a few tries at oathing Platinum Angel on turn 2 or setting up a Winter Orb/Propaganda lock or simply being able to Swords or Unsummon that Sliver Queen before it gains flying.
And even if the earlier rounds aren't overly difficult, it takes a long time to get through the first 8 duels, especially since you can't just bust out a fast red deck and try to make a quick kill every time. Mostly I look for a lockdown first, THEN a win condition. Or if I'm using a turn 2-3 kill deck with Tendrils of Agony, there are tons of cards to go through before tapping 2BB with 10 spells already played.
So...yeah. I do enjoy the challenging part of it, but for simply unlocking cards, it's not overly fun to get 8 rounds through then see a bad hand and an even worse when after taking a mulligan. I wish we could earn continues with consecutive wins so that when we do make it to the harder matches, we have a few tries at oathing Platinum Angel on turn 2 or setting up a Winter Orb/Propaganda lock or simply being able to Swords or Unsummon that Sliver Queen before it gains flying.