You must have this many "Crystal Beast" cards in your Spell & Trap Card Zone to activate and to resolve these effects.

?1+: This card cannot be destroyed by card effects.

?2+: Once per turn (including the opponent's) you can halve the Battle Damage you take.

?3+: During either player's turn, when a Spell/Trap Card is activated: You can send 1 "Crystal Beast" monster you control to the Graveyard; negate the activation, and if you do, destroy it.

?4+: Once per turn, during your Main Phase: You can draw 1 card.

?5: Once per turn, during your Main Phase: You can target 1 "Crystal Beast" card in your Spell & Trap Card Zone; Special Summon that target.