How the hell did ralsei learn to heal 100hp?

Doing a geno run in undertale, only killed glydes in snowdin and got this.

this gotta be in my nightmares..

.

500. Streak.

Bro is NOT helping 💀

holy.

god, i wasted a whole 3 hours ;-;

[btw i reseted at 100 bcuz its useless to get 500]

I AM NOT A MORON

DELTARUNE TOMMOROW!!