Dark Room of Nightmare [RP02-EN078] Common 120 Set: Legendary Hero Decks Card

Set: Legendary Hero Decks Card type: Synchro/Effect Monster Rarity: Common Attack: 4000 Defense: 3500 1 "Nordic Ascendant" Tuner + 2+ non-Tuner monsters Once per turn: You can make this card be unaffected by Spell/Trap effects until the end of this turn

or its effect

Set: OTS Tournament Pack 4 Card type: Field Spell Rarity: Super Rare When this card is activated: You can add 1 LIGHT Machine-Type Union monster from your Deck to your hand

After that damage calculation

Dark Room of Nightmare [RP02-EN078] Common 120 Set: Legendary Hero Decks CardSet: Retro Pack 2 Card type: Continuous Spell Rarity: Common Each time your opponent takes damage from a card's effect, except "Dark Room of Nightmare", inflict 300 damage to your opponent.