Frightfur Sabre-Tooth [DOCS-EN043] Ultra Rare Dragon Gathering You can only use each

You can only use each effect of "Keeper of Dragonic Magic" once per turn

reduce the Levels of monsters in your hand with that name by 1 for the rest of this turn (even after they are Summoned/Set)

Set: Battles of Legend: Relentless Revenge Card type: Effect Monster Rarity: Secret Rare Attack: 600 Defense: 1500 If this card is Normal or Special Summoned: You can target 1 Level 4 or lower Dragon monster in your GY

Set: Advent Calendar 2018 Card type: Effect Monster Rarity: Super Rare Attack: 1200 Defense: 2500 You can Special Summon this card (from your hand) to your opponent's field in Defense Position

Frightfur Sabre-Tooth [DOCS-EN043] Ultra Rare Dragon Gathering You can only use eachSet: Dimension of Chaos Card type: Fusion Effect Monster Rarity: Ultra Rare Attack: 2400 Defense: 2000 1 "Frightfur" Fusion Monster + 1 or more "Fluffal" and or "Edge Imp" monsters When this card is Fusion Summoned: You can target 1 "Frightfur" monster in your Graveyard; Special Summon it. All "Frightfur" monsters you control gain 400 ATK. If this card was Fusion Summoned using 3 or more Fusion Materials, it cannot be destroyed by battle or card