This powerful special allows you to choose one of your creatures and take it with you to the next level. Transferring a level 10 creature onto a new map certainly does not make things more difficult, and could be considered a crutch. This is not to say it isn't entertaining, though, and it can add new dimensions to the game. If you lose the next realm and must restart, you will not keep the creature. A good time to save the game is right at the end of the previous realm, before activating the Transfer, giving you a quick choice of transfers from that dungeon.