Grindstone

This can be obtained in the Daily Grind section on the level select screen. This was available for me after completing the first few levels.

You will want to select the Fortune Grind mode. The objective in this mode is to press the button on the wheel of fortune at the top of the screen a certain amount of times. The one I attempted required 7 spins. Each time it spins, something will happen such as new enemies spawning or powerup/resource tiles spawning on the map. Score doesn't matter here, just surviving until the spins are done will earn you the achievement. You should be able to hover around the top of the screen and hit the button each turn. Just pay attention to nearby enemies and make sure you aren't ending a turn next to one that will attack. Taking damage is fine as long as you don't die before the spins are done.