found-2
Explanation
This is a single-panel comic with a caption. A child is in bed, and a massive, monstrous creature looms over them saying "Aaahh, so you have found me, curious one." A tiny fairy figure is also visible. The caption reads: "Turns out 'the Tooth Fairy' is just one of the drones from the fairy hive."
The humor comes from taking the innocent childhood myth of the Tooth Fairy and reimagining it through a science-fiction/horror lens. The cute, singular Tooth Fairy is revealed to be merely a drone -- a small scout or worker -- sent from a much larger "fairy hive," implying an insectoid colony structure. The massive creature is apparently the queen or central organism of this hive. The child has inadvertently discovered the terrifying truth behind a wholesome bedtime story. The comedy lies in the tonal whiplash between the cozy childhood setting and the Lovecraftian reveal, a signature SMBC move of finding the darkest possible interpretation of an everyday concept.