Active command: "deadly precision" (or simply 'deadly')
This puts a buff on the user. While that buff is active, any time
damroll is used, it uses hitroll instead. Every time it does this,
it costs 12 mv. If the user is out of mv, the buff goes away.
You can use the 'deadly' command to remove deadly precision
when you get low on mvs to let yourself regen mvs before you run out.
Note: when you are past a certain threshold of low mvs, you will
do next to no damage due to exhaustion. Try to remove deadly precision
before then. Doing damage with 0 damroll is preferable to exhaustion damage.