"Hand Destruction" Rating Score by ブルーバード

Exchanging two cards in your hand isn't bad at all, and it's even more so in this day and age where GY effects are heavily used.
However, if the opponent also trades with you, you run the risk of triggering a hand trigger, and the drawback is that you can't activate it unless your opponent has two cards in their hand. If you try to use it in the second attack, the opponent's hand may be completely empty and you can't even activate it.
Also, he can't trigger Dark World because he "sends to GY" instead of "throwing it away". I'm also worried that it's easy to miss the timing due to the draw after sending to GY.
Therefore, 《Dark World Dealings》tends to be more stable as a hand exchange, although the amount is different.
However, the point that it is a Quick-Play Spell is unique as a hand exchange. Since it can be activated during the draw phase, it can be used as a trigger for 《Heart of the Underdog》.
It can also be expected to interfere to some extent. If you lay face down first, you can discard cards you don't need and use it as a chance to attract new triggers. The exchanged hand is exactly Schrödinger's cat for the opponent, giving pressure. If it's the second attack, hit the hand trigger that's waiting to go out and knock it down.
It's subtle as a hand exchange, but it can be evaluated to a certain extent as a hindrance.