Draconic

There are amongst the constellations four great draconic or serpent-like forms.

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[…] they no land / Doom'd to bewail the blasphemy of laws / Making kings' rights divine, by some Draconic clause.

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The sexual instinct can hardly be changed by prescriptions; I doubt whether all laws against homosexual intercourse, even the most draconic, have ever been able to extinguish the peculiar desire of anybody born with homosexual tendencies.

Source: wiktionary

In the first months after the October Revolution Lenin was already demanding "the most decisive, draconic measures to tighten up discipline."

Source: wiktionary