I'm trying to model a battleaxe and I'm trying to sharpen an edge I created and so far using bevel, extruding and scaling doesn't do anything but mess it up.
Is there anyway I'm able to make the end of the mesh converge at a sharp angle?
Woah there! that subdivision you did is what is holding you back at the moment.
You'll want to change the edge flow in order to be able to fix the curvature in the way you said.
However, there is a way to give this mesh the shape you want, even in its current state.
Step 1: select all the faces that will be starting the edge.
Step 2: hit E, right click and then Alt+S then drag your mouse until you like how it looks, then left click.
Step 3: select the angular edges that you want to get rid of.
Step 4: hit X and select dissolve edges.
Here is an image explaining the process: