It means that having it in your opening hand is unlikely to be a good thing, but it does a lot of work after the first couple of turns, so its usually worth plopping one into your decklist
For example, the first die roll costs , the second costs , and so on
Changing a creatures controller immediately removes it from combat, so Charisma becomes a form of super-deathtouch which should seriously discourage swinging into your aura-bearer
Titania, Protector of Argoth Titania, Protector of Argoth allows you to lessen the sting of sacrificing your own lands
These cards are worded specifically to bend the rules of Magic, letting you play as many of them in your deck, with a bonus or two for having more of them in play or having played them during a game