I wish the axe would at least be permanent or have a way to fix. I wanted to experiment more with Ultra hand last night (still on sky island, don't have much time to play) so started felling trees. But the axe broke. Found another, broke as well. Looking for another, my build reset as I wandered out of range. So now I'm hesitating to experiment with trees as I might need my axe later...
Maybe there is a way to make an axe head later? I've only just completed the second shrine for fuse ability. (What a convoluted way to make fire arrows...)