1. I like this. Agreed with Redoubter that this would probably be more effective than Speed Bump, and I like that it only protects itself. Limits its use in Type 2, but decently strong for Type 1.
2. I like this, too. It's strong, but the once per game limitation and inability to hit dominants keeps it from being broken on my initial read. Question - this would not reset if shuffled, correct? What about Type 2, with two of these in a deck, does each get to trigger once, or just one trigger overall? I'm not as up on 'once per game' rules as I should be.
3. Back it down to one card from hand, keep the random aspect. "When this Lost Soul is placed in a site, topdeck a random card from an opponent's hand."
- This could actually be a cycle of souls, using different triggers and zones to put cards from hand. Maybe topdeck could be a chosen card from opponent's hand, and a different soul could underdeck a random card. Could also set aside a random or specific card for a certain number of turns. Maybe 'tuck' (place X cards from top of deck) a card. Instead of 'when placed in a site', could be when drawn, or placed in LoB, or when placed in LoR, or when exchanged. Just thinking out loud, but there's a decent amount of design space here.
4. This one's a bit too much. Very bad for multi-player. It's an interesting idea, but I'm not sure what I'd do to take that and make it work for multi.
5. Anti-NJ souls FTW. Love it.