EdgeRunner
This modification reverts the fix for the system bug MC-1133. If you're not familiar with the original glitch, here's the essence: entities now disregard block effects when positioned at the edge.

Important Compatibility Notes
When installed client-side only on a dedicated server, the mod functions exclusively for your character. It's worth mentioning that magma blocks still cause damage since this mechanism is processed by the server.
When the mod is installed on the server side, the changes apply to all in-game entities.
If EdgeRunner is present server-side only, only the magma block effect will be ignored for characters.