Bad Reaction to Simochi
Edison Card Text
As long as this card remains face-up on the field, any effect of increasing your opponent's Life Points is changed to inflict the same amount of points in damage to your opponent's Life Points.
Dark Beginning 2 • 2005-07-27
No targeting
No Damage Step effect
Banlist • Unlimited
Interactions
If Simochi/Nurse and Prime Material Dragon are both on the field, how does LP gain resolve?!
Upstart Goblin is activated while both replacement effects are present.
The thread indicates conflicting sources; the working idea is to apply replacements in sequence, effectively canceling in pairs. A definitive source for multiple copies was still being sought.
Rulings
edisonformat.net
As long as this card remains face-up on the field, any effect of increasing your opponent's Life Points is changed to inflict the same amount of points in damage to your opponent's Life Points.
●The Continuous Effect applies while this card is face-up on the field. It does not activate.
●This effect is not cumulative. If you control 2 copies of Bad Reaction to Simochi and your opponent activates Dian Keto the Cure Master, they only take 1000 points of damage.
●VS. Prime Material Dragon: if both Bad Reaction to Simochi and Prime Material Dragon are on the field when Player A's Upstart Goblin resolves, Player B will gain 1000 Life Points (gains / damage happen normally).
●These rules apply similarly to Nurse Reficule the Fallen One (erratum: Darklord Nurse Reficule).
●If you control this card on the field and activate Rain of Mercy (which makes both players gain 1000 LP): you gain 1000 Life Points and your opponent takes 1000 points of damage.
edisonformat.com
As long as this card remains face-up on the field, any effect of increasing your opponent's Life Points is changed to inflict the same amount of points in damage to your opponent's Life Points.
The Continuous-like Effect applies while this card is face-up on the field. It does not activate.
This effect is not cumulative. If you control 2 copies of "Bad Reaction to Simochi" and your opponent activates "Dian Keto the Cure Master", they only take 1000 points of damage [REF]].
VS. "Prime Material Dragon": if both "Bad Reaction to Simochi" and "Prime Material Dragon" are on the field when Player A's "Upstart Goblin" resolves, Player B will gain 1000 Life Points (gains / damage happen normally) [REF]].
These rules apply similarly to "Nurse Reficule the Fallen One" (erratum: Darklord Nurse Reficule).
If you control this card on the field and activate "Rain of Mercy" (which makes both players gain 1000 LP): you gain 1000 Life Points and your opponent takes 1000 points of damage.