REDU format ruling
Memory Crusher

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)If this card successfully attacks directly, inflict 100 damage to your opponent for each card in their Extra Deck.
Rulings
- "Memory Crusher’s" effect activates when battle damage is inflicted.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.