Castle Garenbrig (Promo Pack) [Throne of Eldraine Promos] SV86 during your opponent's Standby Phase:

during your opponent's Standby Phase: You can inflict 300 damage to your opponent for each card your opponent controls

(If the target is Set

Set: Diamond & Pearl: Stormfront Type: Lightning Rarity: Holo Rare Retreat cost: Colorless

Set: HeartGold & SoulSilver: Trainer Kit - Gyarados Type: Water Rarity: Promo Retreat cost: Colorless

* When this card declares an attack on a face-up monster your opponent controls: You can detach 1 Xyz Material from this card

Castle Garenbrig (Promo Pack) [Throne of Eldraine Promos] SV86 during your opponent's Standby Phase:Set: Throne of Eldraine Promos Type: Land Rarity: Rare Castle Garenbrig enters the battlefield tapped unless you control a Forest. {T}: Add {G}. {2}{G}{G}, {T}: Add six {G}. Spend this mana only to cast creature spells or activate abilities of creatures. Without Garenbrig's strength, the realm would succumb to the wilds.