Looks a bit thin overall. Not sure if youre going for a concept or not. Also, the bladed edge is not super smooth or curved. Looks like you got some bunched up edge loops.
Dosnt look very much like a hammer, and the design itself is very weak as well, Id really look at some reference and try out some sketches before diving into any more modelling.
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Whats the purpose of this axe in fiction?