The details are as follows:
Open 'States' tab and select a new line, name the state to whatever you want.
Top right section 'Features', select new line and click.
Select 2nd tab 'Param'
Select Ex-Parameter, then MRF (magic reflection rate)
Set to 100% if you want it to be total.
Central section, top, select 'Restrictions'
Select 'Cannot move' from the drop down options.
Below that in the 'Removal conditions', select where there is a box saying 'None' and choose 'Turn end'
When you do that the boxes directly underneath become active. Put 4 in the left box and 5 in the right box and that will give you the duration of 4-5 turns for the state to last. alternatively, you could put the same number in both boxes, depends what you want.
Click OK. Create a skill and have it call up this state.