RE: Splinterlands - How to go from silver 3 to gold 3 spending $0.59 and in 30 minutes.

I'll do a tutorial on this in the next season, but a tip I can give you is that cards with magic damage have ease in the bronze league.

Try using the water deck with the summoner Alric Stormbringer (you will need to rent him) or using the earth deck with the summoner Obsidian always focusing on magic cards, but the water deck does better in this league.