"D.D. Crow" Rating Score by わがじゃん

One of the oldest hand triggers.
First of all, it is excellent that there is no activation limit such as turn 1, and it will not spoil even if multiple copies are piled up in your hand.
It is also excellent that it can exclude GY regardless of the type of card, and it is also effective for spells and traps that activate GY, which has increased in recent years. Therefore, you can prevent the actual activation by hitting this card outside the activation timing.
Furthermore, the completely free chain is also very good, especially due to the rule revision in April 2020, the effect of the card activated by GY when discarded due to cost, etc. The rule is that if the card is not present in GY when building a new chain (when the effect is activated), it cannot be activated, so it is now possible to block the activation by excluding it with this card on the previous chain.
There are 《Ghost Belle & Haunted Mansion》, 《Skull Meister》, and other hand triggers that interfere with the activation of GY effects, but this card is probably the one that can be dealt with most often.
The status of Winged Beast, DARK, and Level 1 is also very good as a monster on the field because it is caught in various costs and Special Summon conditions.