This time something lighter:

From the topic title, I was expecting something internet-y, and you delivered!

Add "you must cast" to the text. Otherwise fantastic now make a whole Troll expansion.

Add "you must cast" to the text.

What?

I think he is suggesting that the spell could be a 'You must cast...' which would make it rather brutal, but kind of like being 'IT' from the game Gauntlet.

It would make for short games though!

The last sentence could use 'cannot' instead of 'may not' though. It's a bit more forbidding...

Add "you must cast" to the text.

What?

Ah, I see the aim was not to force the casting of the spell. Right'o'.

No, the aim is to clog character's spell selection/limit.

No, the aim is to clog character's spell selection/limit.

We call it "Spell Locked" yeah great idea.