Slifer the Sky Dragon (JMPS-EN005) [JMPS-EN005] Ultra Rare Basic Metal Energy then if you added a

then if you added a card to your hand

Set: EX: Unseen Forces Type: Metal Rarity: Holo Rare Retreat cost: Colorless

Set: Neo Discovery Unlimited Type: Darkness Rarity: Rare Retreat cost: Colorless

You can't add more then 20 damage in this way

Set: Diamond & Pearl: Black Star Promos Type: Colorless Rarity: Black Star Promo

Slifer the Sky Dragon (JMPS-EN005) [JMPS-EN005] Ultra Rare Basic Metal Energy then if you added aSet: Shonen Jump Magazine Promos Card type: Effect Monster Rarity: Ultra Rare Requires 3 Tributes to Normal Summon (cannot be Normal Set). This card's Normal Summon cannot be negated. When Normal Summoned, cards and effects cannot be activated. During the End Phase, if this card was Special Summoned: Send it to the Graveyard. This card gains 1000 ATK and DEF for each card in your hand. When a monster(s) is Normal or Special Summoned to your opponent's