Spellbook of the Master [CBLZ-EN062] Secret Rare Colorless[+10] You can treat Level 4

You can treat Level 4 or lower "tellarknight" monsters you control as Level 5 when Xyz Summoning using 3 or more monsters as Xyz Materials

if a Beast-Warrior-Type monster you control attacks a Defense Position monster

from your hand or Graveyard

This card's Special Summon cannot be negated

Set: The Lost Millennium Card type: Effect Monster Rarity: Ultimate Rare Attack: 2600 Defense: 1200 If this card was Special Summoned by the effect of "Ultimate Insect LV5"

Spellbook of the Master [CBLZ-EN062] Secret Rare Colorless[+10] You can treat Level 4Set: Cosmo Blazer Card type: Spell Card Rarity: Secret Rare If you control a Spellcaster Type monster: You can reveal 1 other "Spellbook" card in your hand to target 1 "Spellbook" Normal Spell Card in your Graveyard, except "Spellbook of the Master"; this card's effect becomes that target's effect. You can only activate 1 "Spellbook of the Master" per turn.