User blog comment:Miskos3/Fairy Tail Episode 241: Tartaros arc: Devil Reincarnation, Review/@comment-24.200.220.241-20150712055421/@comment-7418318-20150712065956

2) Franmalth was carrying the Chairman away, so he couldn't see Happy anymore and Silver either didn't care about the cat or he might even have let him escape intentionally. After all he also showed mercy to Lisanna and felt bad for freezing the Sun Village out of a mistake.

And that's where I stop for now, but a few episodes down the road you'll see why Silver acts this way.

3) I don't know why Natsu would be unfrozen or put into the same cell as Lisanna, but the reaosn why Lisanna was put in jail I do know. Sayla promised Elfman that as long as he obeyed her, she would spare his sister and apparently Salya keeps her promises.

5) There are two kind of magic items. One is as you say requiring that the user pumps some of their own magic into it (or something similar), those are called holder magic. But there are also others that come with an internal power-source (like a battery) and can be used even by people without any magic. All the items in Edolas for example, Mystogan's staffs and most likely also the light pen that Mira used once.

Or he (or more likely Lisanna) might have used the spike on the backside of the blade to force the lock open without magic.

6) "Grab the cards and fly out of the guild". That's all she needs to tell them right away. The rest can wait until they are out of the guild. She can speak to them even while she's inside the card.

8) Erza didn't escape out of the shackles by herself. Natsu and Lisanna found her cell and freed her.