Breathing Life Into The Cards

Lucky Save: No one has pointed out an abuse for refunding with this card. I have no idea what you are talking about there Razor. It HAS been pointed out that FMV is a better alternative for protecting against an attack. As for monster D protection, you might as well either pay up 2 more for a counter spell or just have another copy of the monster. With Lucky Save as is, you're going to just pay the price of the monster to play it again anyway and at least with another copy in your deck you don't have to have the card at the same time you happen to have the monster in play.

Resurrection: There isn't much you can do to this card without changing the concept. I will say, however, that it is not useful because it has a better alternative: Life. If we're allowed to give it cantrip, I'd go with that as it's much better than yet another cost reduction.

Rebuild: Unlike Res this doesn't have a spell that does the exact same thing (at least that I can think of). You could leave it as is and it'll still be unique at least. I'd still go with cantrip rather than another cost reduction though.