If you use Shadow Movement to sneak into houses and a pegasus team to pull the flying sleigh... yes, in this world, it's possible to become Santa Claus! But... the Christmas tradition doesn't even exist in this world. When Rimuru tries to explain it in detail to the people of Tempest, they end up summarizing it as a "party." The Christmas cake and presents are ready, and most importantly, Kaijin and the other Dwarves create gorgeous decorations that bring the Christmas mood to Tempest. On top of that, Eren and the children treat everyone in town with their heavenly singing.
Stay hidden from children
Spy

Leave presents by pillows undetected
Shadow Movement

Deliver many presents in one day
Body Double

Fly freely through the night sky 
Flight
البقاء متخفّياً عن أنظار الأطفال
Spy

ترك هدايا بجانب الوسائد دون أن ينكشف أمره
حركة الظلّ

تسليم الكثير من الهدايا في يوم واحد
جسد مُضاعَف

التّحليق بحرّية في سماء اللّيل 
طيران
Damit ihn die Kinder nicht finden
Spionage
Sigilo para que los niños no lo vean
Sigilo para que los niños no lo vean
ARS OCCULTA
I bambini non
potrebbero trovarti

Spia
Discrição
As crianças
não o veem
Прятаться от детей
ШПИОН

Незаметно оставлять подарки
ТЕНЕВОЕ ПЕРЕМЕЩЕНИЕ

Доставить за день много подарков
ДВОЙНИК

Летать по ночному небу
ПОЛЁТ