Advanced format ruling
Crystal Beacon
Card effect (current official text)Special Summon 1 "Crystal Beast" monster from your Deck. You must have 2 or more "Crystal Beast" cards in your Spell & Trap Card Zone to activate and to resolve this effect.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.