He's being diagnosed by a evil skeleton

DustRemixerNightmare. (Sans.)

Vital/Delta!Sans.

This week's Fan Art Friday celebrates Undertale! Accept the quest in your quest log to get started.

TRR!DustKAB. (Dusttale: Double-edged Blade.)

woke up from a nap and immediately made this for no reason

Toomato!KillerKAB. (Undertale Something New: A Deal's A Deal.)

Alice's Purgatory Triad.

Phase 1.5: Escape.

ralsei!

FundementalTale: Ritual of Murderer.

(FundementalDust take.)