Monsters with REFLECTIVE spells.

I noticed that monsters that cast a spell which makes them reflect damage
have the spell description of "reflect 6-grade spells".
Ofc i myself know that 6-grade spells is refering to the old system of spells 
but new players wont be able to get the idea since 3 grade is basically a maxed spell..
And ofc does it mean that only maxed out spells are reflected? all my chars are 200 so i wouldn't know the difference....