Underworld Breach [Theros Beyond Death] SWSH011 you can Special Summon 1

you can Special Summon 1 "Red Dragon Archfiend" from your Graveyard

Set: Legends Type: Sorcery Rarity: Uncommon Cost: {R} Each player shuffles the cards from their hand into their library

Set: Antiquities Type: Land — Urza's Power-Plant Rarity: Uncommon {T}: Add {C}

A fierce and agile warrior

or your "Marincess" Link Monster this card points to

Underworld Breach [Theros Beyond Death] SWSH011 you can Special Summon 1Set: Theros Beyond Death Type: Enchantment Rarity: Rare Cost: {1}{R} Each nonland card in your graveyard has escape. The escape cost is equal to the card's mana cost plus exile three other cards from your graveyard. (You may cast cards from your graveyard for their escape cost.) At the beginning of the end step, sacrifice Underworld Breach.