I'm talking about after this card has been out for some time. Think about it. Even if it's been out for awhile, will newbies know what it does unless they use actual experience? Making it rare would give players time to look up its power before being able to use it unknowningly.
Newbies won't know what it does. Most people wouldn't know what it does, and it's not a good thing if they need to consult a secondary source to find out the effect of a card. It's not a good thing for most pieces of software if the user has to look up what a button does in the instruction manual.
And it would be a fine thing to have this pulled out on you when you had no idea what it did.
People who use Nymph's Tears have to remember what each of the 12 nymphs do. This only has 11 different abilities, many already in-game.
That puts both cards at fault. Mistakes can be made, and past precedent does not justify future actions. The card has to be reviewed as it currently is, and both cards need modifying to reveal more information.