Gagaga Illusion X SPELL If you control a "Gagaga" monster: Target 1 monster in your GY
These types of kill something that was damaged effects are often underwhelming, just because it takes more work than you'd think to consistently manufacture situations where that happens -- in particular, situations where you can make it happen without giving up significant resources, like an ugly block or an attack
There are no 1st Edition stamps anywhere in the 151 set
It is super easy to imagine Gavin calling up someone at WotC and saying, whens a good time for us print so we can unban it at the same time? These are enormously powerful cards, worthy of being banned, but less powerful than some other unbanned cards
Once per turn, when a card from your side of the field, hand, or Deck is sent to Graveyard by the effect of a card you control other than this card: Add 1 "Mercy Family" monster from your Graveyard to your hand