>>536728097
>In Deltarune, we see that Kris and Dess created the very idea of Lancer, making Dess kinda his mama.
>Gaster (Rouxls Kaard) takes in Lancer as a son
>Lancer forms a wonderful friendship with Susie and Ralsei


>Sans treasures the picture of Kris, Ralsei, and Susie
>Sans inherits Gaster’s technology and research
>Papyrus resembles Dess, the creator of Lancer, and Sans considers Papyrus to be his brother.

Sans wasn’t originally from Deltarune and then ran off to Undertale. He’s returning back to it… To help his friends when he couldn’t back then… and the big change that happened was when he changed his card from a jack of spades to an ace of spades. Becoming the strongest card by essentially cheating his very existence.