Don't be ridiculous. I don't have to "master" a spell to monopolize it.[/b].
The point before wasn't about trying to monopolize a spell which is inherently ridiculous, it was about how someone could have a bunch of spells and one person could have gone deep into a particular base and intent and destroy the other person with just a few really powerful spells, or another way of looking at it, their costs go way down and so even though one person has 100 spells to cast they can only do what maybe 20 if they're well rested.
The other person can have 10 and can cast those same to 100 times.
