Umbreon (32/75) [Neo Discovery Unlimited] XY51 You can only use this

You can only use this effect of "Euler's Circuit" once per turn

Set: Black & White: Next Destinies Type: Psychic Rarity: Ultra Rare Retreat cost: Colorless

Set: Astral Pack 3 Card type: Xyz/Effect Monster Rarity: Ultimate Rare Attack: 1800 Defense: 2300 2 Level 4 monsters

When this card is destroyed by your opponent's card and sent to the Graveyard: You can Special Summon 1 Spellcaster-Type monster from your hand or Deck whose Level is less than or equal to the number of "Spellbook" Spell Cards in your Graveyard

Your opponent cannot activate Spell or Trap Cards until the end of their 2nd turn after this card is Normal Summoned

Umbreon (32/75) [Neo Discovery Unlimited] XY51 You can only use thisSet: Neo Discovery Unlimited Type: Darkness Rarity: Rare Retreat cost: Colorless