Toshiro Umezawa [Secret Lair Drop Series] XY103 destroying this one card doesn't

destroying this one card doesn't defeat both Dark Magician and Dark Magician Girl at the same time – you'll get to Special Summon both of them to the field from your hand

When the last is removed

including a new Effect Monster from the same lineage as Ash Blossom & Joyous Spring

"One pain is lessened by another's anguish

Toshiro Umezawa [Secret Lair Drop Series] XY103 destroying this one card doesn'tSet: Secret Lair Drop Series Type: Legendary Creature Human Samurai Rarity: Rare Cost: {1}{B}{B} Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1 +1 until end of turn.) Whenever a creature an opponent controls dies, you may cast target instant card from your graveyard. If that spell would be put into a graveyard, exile it instead. Though only looking out for himself, Toshiro ended up saving all of Kamigawa.