Running out of Skulls is the final achievement. now. We will show you the easy guide on how to farm skulls in this game. Let’s look at it.
In order to do this method, you need to have at least reached level 21 (pirate boss level) and have achieved preferably the max rank with all your skill points spent (this will ensure that you won’t have any problems with going infinite)
On level 21, reach the boss section (it doesn’t matter if you lose a gem or two). It is important that you have towers built and upgraded where the divers spawn near the boss, to make sure that they can’t take your gems. As long as you play the level well and have max rank/skill points, this should be easy enough.
Now, make sure you don’t click the spiky things that come out of the ship’s cannon. What will happen is that the level will continue infinitely, and enemies will keep spawning, as long as you aren’t damaging the boss. What you want is to stay on the first stage of the boss where only the divers and weak enemies spawn. So don’t click the spiky things at all.
As long as you have enough towers and they are upgraded enough, you should be able to survive infinitely without having to cast any spells or anything, which makes this possibly the only way to farm skulls in a semi-idle way.
So congrats, you are now successfully farming skulls! They should drop from enemies about once a minute. While it doesn’t seem like the items disappear, I would recommend picking them up every minute or two. Max out the levels of all your towers to make the farming even faster.
Here’s a picture of what it looks like: