Lifesteal SMP ( Totem & End control )

It is specifically designed for Lifesteal SMPs to disable the “Totem of Undying” death-resurrection mechanic and prevent the End Portal from being filled, locking the End dimension.

It requires server-side support and “Op” permissions to run in two modes. Mods will most likely not work properly in your single-player world. 

Use the “/nototem” command to control totem behavior.
To control the end dimension, you can use the “/endlock” command.

This mod must be installed on both the server and the client for it to work properly.