Sagu WildlingSagu Wildling, for example, would be a bad thing to see in your hand early in the game if it were simply a 5-cost Dragon, but the 1 mana sorcery that allows you to replace it with a basic land means that more often than not you will be glad to see it early, and glad to see it late when you need a flyer and a bit of a life boost
Noxious Assault can leave your opponents in a state of Catch-22 in the right circumstances: Theyll take a poison counter for each creature they block, but theyll also get two or more poison counters from each creature they let through
Not just the aesthetics, either
If the copied creature is a token, the enchanted creature copies the original characteristics of that token as stated by the effect that created that token
Floodborn characters are made to give a new perspective on any of the chosen characters, like Hades as King or giant-sized Tinker Bell