REDU format ruling
Crystal Abundance
Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Send 4 "Crystal Beast" cards from your Spell & Trap Card Zone to the Graveyard; send all cards on the field to the Graveyard, then Special Summon as many "Crystal Beast" monsters as possible from your Graveyard, up to the number of cards your opponent controlled that were sent to the Graveyard by this card's effect.
Rulings
- Sending 4 Crystal Beast Monster Cards from your Spell & Trap Card Zone to the GY is a cost to activate this card.
- You can activate this card when there are no cards on your opponent’s side of the field. However, you cannot Special Summon any "Crystal Beast" monsters from your GY if you do.
- You cannot activate this card while Macro Cosmos is active.
- You can activate this card while Dimensional Fissure is active. The Crystal Beast Monster Cards sent to pay the cost are sent to the GY, not removed from play.
- You can chain the effect of Royal Oppression to this card to negate the Special Summons.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.