Once you have made your way through all the world map levels and collected the 5 gems the final area will open - The Dark Tower
Once you have made your way through the level we come up against.....another boss
Welcome to the Dark Overlord.
This is the only boss without a set pattern, he does have set moves but no set pattern like the other bosses. He also takes a lot less damage and a surprise.....
FYI my strategy was to use the Valkyrie, I had purchased the Flame sword (a random item you can purchase for 300 coin). While the Barbarian does double the hit damage to the Valkyrie - the flame sword makes up for this and the bow comes in handy.
Admittedly this boss is a little luck based as you can have some easy attacks against you or not. There is some frames were you can walk through the boss when he attacks. The attacks are as follows:
*Pulls back his sword above his head and rushes you (you can walk through him, get behind and attack)
*Jumps up and slams his sword down - move behind him again and attack
*Floating up in the air and holding his sword - summons falling swords you can stand between when he lands and you can attack
*Standing on the ground, raising his sword and then stabbing the ground after a lightening strike. This is a two stage attack. Stage one he stabs the ground sending out fire spiking out of the ground - run to the side and jump up on the platform when its close (be careful the platforms disappear). Stage 2 he raises his sword again and sends a circle of swords. They move in a set direction so simply dodge.
Once you have his him enough he dies......yay!!! The surprise, a second stage boss
This one is pretty simple thankfully. Firstly he takes more damage and is a very set pattern.
Stand in the middle and he will send 2 spike balls that bounce around the stage. If you have he Valkyrie shoot one arrow straight up and after a few seconds he will drop down for you to attack - just keep jumping up and attacking. After a few hits he will raise up and spread his arms out and send out a circle of swords like in stage 1 however his arms will move when you move so just try to dodgy and rinse and repeat until he is finally dead (for real this time).
If your playing as the barbarian (i didn't try the other characters) you need to climb the platforms and attack him while he is sending out spike balls however be aware he can send out more spike balls that bounce around the stage and he moves so it can be a little more difficult