Brass's Bounty

You touch the ground and it cracks beneath your fingers. All earth within 60ft of you starts shaking and crumbling, revealing molten gold beneath the ground. You send out up to three craks with a width of 10ft to reveal the gold. All creatures within these crakes must make a dex saving throw or fall onto the molten gold and take 10d10 fire damage. If they suceed they manage to get to solid ground. If a creature falls into the molten gold, they make a dexterity throw as the action on their turn to escape the lava, taking another 6d10 damage each turn, even if they suceeed. As long as you maintain concentration, you can send out an additional crack as your action every turn. After two minutes, the lava cools down to a normal, but still hot, temperture and creatures no longer take damage from it. The gold can be mined as a raw material, and it is up to the DM on how much the gold is worth and how hard it is to mine. 

As a ritual. If this spell is cast as a ritual, it takes 3 days instead of the usual 10 minutes.