REDU format ruling
Prime Material Dragon
Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Any effect that would inflict damage to a player increases their Life Points by the same amount, instead. During either player's turn, when a card or effect is activated that would destroy a monster(s) on the field: You can send 1 card from your hand to the Graveyard; negate the activation, and if you do, destroy it.
Rulings
- If this card and "Bad Reaction to Simochi" are both applying, any effect that gains LP will gain LP, and any effect which inflicts damage will inflict damage.
- The ② effect can be activated during the Damage Step, as it negates activations.
- The ② effect cannot be chained to effects which are not guaranteed to destroy a monster(s), such as "Snipe Hunter".
- The ② effect cannot be chained to a "Royal Oppression" which is negating the summon of a monster not already on the field, such as the summon of "Cyber Dragon".
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.