To complete the quest "Kill 100 cactus enemies with Thorns damage" in Megabonk, you'll need a lot of patience. Some details make completing this quest a bit trickier than it should be, but it's still possible as long as you have the right unlocks.
Before you keep reading, check if you have the minimum requirements to complete this quest. You'll need the Desert map on any tier and the Thorns Tome or Athena, preferably both. Athena gains two points of Thorns with every level, so using her lets you deal Thorns damage to Cactus even if you don't find the Thorns Tome. If you don't have her, the only way to get Thorns is with the Thorns Tome.
