Ladon

Hesiod's Theogony places Ladon within its long genealogical catalogue of early monsters, the offspring of Phorcys and Ceto, a lineage that also produces the Gorgons and other primordial terrors of Greek myth, giving Ladon a pedigree among the oldest and most fundamental monstrous beings in the tradition rather than treating him as a late addition. His post was fixed and singular: guardian of the golden apples growing in the garden of the Hesperides, a wedding gift the earth goddess Gaia had given Hera, and prized by her highly enough that she set a dragon of many heads, in some tellings a full hundred, and many distinct voices, to watch over the tree without rest.

The garden itself sat at the western edge of the known world in Greek geography, near where Atlas held up the sky, a location that placed Ladon's post at one of myth's standard boundary-markers between the ordinary human world and something stranger beyond it, alongside other far-western wonders like the realm of the dead. A dragon that never slept, watching a tree whose fruit conferred a mark of divine favor rather than any ordinary value, made Ladon less a monster to be casually defeated than a fixture of the world's outer edge, doing a single unglamorous job with total reliability for as long as the tradition needed him to.

The eleventh of the twelve labors, retrieving the golden apples of the Hesperides, survives in two genuinely different versions of how Heracles dealt with Ladon, and Apollodorus's Bibliotheca is one of the sources that preserves both possibilities rather than settling on a single account. In the more direct version, Heracles simply kills Ladon outright, generally with an arrow, and takes the apples from the tree himself once the guardian is dead, a straightforward monster-slaying resolution consistent with several of the other labors. In the second, more indirect version, Heracles never personally confronts Ladon at all: knowing he cannot simply walk into the garden and take a wedding gift belonging to Hera without consequence, he instead finds Atlas, holding up the sky nearby, and offers to bear that burden temporarily if Atlas will fetch the apples himself, since Atlas, as father of the Hesperides in some genealogies, could enter the garden without provoking Ladon or Hera the way an outsider might.

The second version leaves Ladon's ultimate fate genuinely unresolved within that telling, since the story's attention moves entirely to Heracles's subsequent difficulty getting Atlas to take the sky's weight back rather than to what became of the dragon in the garden behind them. Later tradition, working from both versions together, generally settled on Ladon's death as the more commonly repeated outcome, reflected in some star-catalogue traditions that placed a serpent constellation in the sky as a memorial to him, but the earlier sources themselves preserve the two accounts side by side rather than treating one as simply correct.