Thread:Kaltias/@comment-24503208-20180404130035/@comment-30570311-20180504175254

1) It's literally the entire quote. The authors of PMMM do this kind of stuff fairly soon (Giving a little phrase to briefly explain a character's lore), especially with witches.

2) It's explained during chapter 9. I can't give scans right now, but you can download it here (The site is safe, don't worry).

Long story short, Homura's shield is connected to Madoka, who is connected to UKG, who is in the old multiverse, so she can open portals to get there