While every Pokemon Generation has popular new entries, the original 151 from Kanto are ubiquitous inclusions in every new era
Not only is this a good mechanical representation of how the creatures are a hivemind that is quick to adapt to new circumstances, but it also makes for decks that can quickly become very powerful
This is true about Mega Charizard
When an opponent's monster declares an attack, or an opponent's monster effect is activated that would destroy a monster(s) on the field, while a monster that mentions "Shining Sarcophagus" is on the field: Destroy as many Attack Position monsters your opponent controls as possible, then if you control "Dark Magician", inflict 500 damage to your opponent for each monster destroyed, also for the rest of this turn after this card resolves, the first time each monster you control that mentions "Shining Sarcophagus" would be destroyed by battle or card effect, it is not destroyed
You cast the instant or sorcery while Seifer Almasy's last ability is resolving and still on the stack
