Question: Leylines increase effective caster level which affects spell variables. Does it also potentially increase the spell levels you can cast?
I only ask because it works in the opposite way and a lowering of caster level means you can no longer cast the highest level spell slot you have.
Edit: Example a level 2 wizard who atunes himself to a leyline would now have a caster level of three which is now high enough to cast second level spells. Does he gain these spells?