Hi, OldTrees.
Thanks for the input. However, my card effect is not "very" similar to the card you linked there. I went to read it, and it's quite different, especially in terms of consequences and strategies it provides.
I'm guessing my explanation was not sufficient, so let me clarify what my cards do.
You play this card, and what happens is that
"you pick one of your opponent's cards in their hands." Then, either of the following happens:
1. If the opponent has enough quanta for the card, the card is played immediately (and, the opponent loses the quanta for that of course). This screws up opponent's plan/strategy.
2. If the opponent does not have enough quanta for the card, the card is discarded. Ouch!
Also, please remember that the opponent is "forced" to use the card. Some may then think so what? However, there are many deeper events that can happen with this. I'll give you some examples:
Example 1: Let's say that the card you chose was Fractal. The opponent was saving that card to pull a combo. However, the only creatures on the field are all crappy cards. But, your opponent is "forced" to use it, so s/he has to use Fractal and end up with cards they don't really want in their hands.
Example 2: Let's say that the card you chose was Creamation. Your opponent was waiting to use that card on a creature they don't need or phoenix. But, let's say that your opponent had Lava Golem on his/her field. Well, the opponent is "forced" to use it, so goodbye to Lava Golem.
Example 3: Let's say that the card you chose was Adrenaline. And, let's say that your opponent does not have creatures on their field, or you killed the last one. And, you have a creature on yours. Your opponent is "forced" to use Adrenaline, so in this case, your opponent has not choice but to use that on your creature. Yay! (the same can happen with Chaos Power, etc. Any boost cards).
Example 4: Let's say that the card you chose was Antimatter. Your opponent was waiting to use that on your powerful creature. But, at the moment, you don't have any creatures. Your opponent is "forced" to use it, so s/he has to use it on his/her own creature. Yay! OR, you do have a creature but a weak one with 2 ATTK or something. Your opponent has to waste Antimatter on that rather than your high ATTK monster you have yet to place on the field. If Neither has creatures at the time, Antimatter goes to waste. Ouch.
Example 5: Let's say that the card you chose was Steal. Your opponent was waiting to steal your valuable shield, weapon, etc. But, at the moment, you only have cards like towers. Your opponent is sadly "forced" to use the card, which means your opponent has to steal a tower.
I think you can see that this card and its game play is very different from the temptation card. It's not random. It's strategized. You can think of many, many more possibilities with this. Also, even if there were cards with similar ideas, I don't remember that being exlusion criteria. Fire bolt & Ice bolt? Also, I humbly think that my card and its element, entropy, is much more appropriate and themed together (no offense to the creator of Temptation).
Entropy elementals deal with disarray and chaotic creatures; they love to confuse their opponent and gamble with luck and probabilities.
Also, for the upped card, it's too bad that the system does not allow for it, but who knows? Maybe programmers can find ways to improve the system if enough card ideas call for such feature? Afterall, it's an evolving game. Fortunately, with this card, the only "active" part for your opponent is "picking a card," which doesn't require much time or coding. BTW, your opponent is not able to see your cards. He just click on one of your face down cards.