I started playing a few months ago and I dusted a lot of cards and I never regret doing so. I have like a ton of commons that I never and will never really use. A ton of rares that is literally just sitting with dust. And really bad epics such as patient assassin.

I got so much necessary cards because of those tiny collective dust. They really add up.

After 4 months and approx 200 packs and 3 adventures. I now can play any deck I want.