It uses Wait funcion so it cant be MUI. If many "Spirit Stomp Jumps" are used at the same time, it may cause lags.
You remove the unit with 2 different funcions:
call RemoveUnit(udg_LastCreatedUnit)
Unit - Remove LastCreatedUnit from the game
You cant remove it twice, so it may cause lags. I suggest you to remove other command.
These MAYBE causes lags, im not sure.