Mask Maker Boss Fight Guide - Kena: Bridge of Spirits
The key for this fight is to be on the offensive as much as possible as and the dash ability.
But, he kinda always starts with the blade attack combo.
You have to dodge / shield them (the best is to dodge the first and shield the second/rest).
Now starting with the offensive.
As he teleports across the boss area, you have to charge at him with a dash as soon as he appears.
If the dash is timed well, you can even stun him for a little while.
If he starts to cast, don't worry, just go for the ads right away to force him to Flee.
When he traps you in this barrier, you must shoot the right clone to break it.
Time is kinda generous during this, so it is even possible to shoot them all.
Once you break out, he get stunned for a while so do as much damage as possible.
Again keep the pressure with dashing.
You should have your courage meter build up by now, so you need to use more powerful attacks accordingly.