Old Republic
The first seal-order.
A thousand years before the films, he looked at a Sith horde and saw a weakness. The Rule of Two is still killing Jedi in the prequels.
Sith Lord. Human · Apatros (Legends). Deceased.
Death
~1000 BBY
Destroyed on Ambria in a duel with his apprentice, who took the Rule of Two forward.
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