1) Skip the Mythos phase where Doom increases and encounter cards must be drawn, 2) Skip the Enemy phase where enemies attack, or 3) Repeat the Investigation phase once more where investigators can act
UR Ultra Rare Gullveig of the Nordic Ascendant X LIGHT Link 1 [ FairyLinkEffect ] ATK 800 DEF - 1 Level 5 or lower "Nordic" monster If this card is Link Summoned: You can banish up to 3 cards from your hand and/or field, and if you do, Special Summon that many "Nordic" monsters from your Deck in Defense Position, also, for the rest of this turn, you cannot Special Summon monsters, except "Aesir" monsters, nor Normal Summon/Set any monsters
Pillow fort cards look to mitigate all incoming damage by either gaining life, incentivizing opponents to attack each other, or just flatly preventing the damage from happening
If you doubt why playing spells at instant speed is crucial, try playing against this guy under its counter pillow strategy
The combo relied on casting multiple copies of this red spell and its brother Unexpected Windfall, and it would generate an insane number of Treasures that can be exploited with Goldspan Dragon to cast multiple spells on a single turn and chain Time Warp effects in the form of Alrund's Epiphany