The essay develops the theoretical figure of fulguratio as a paradigm of discontinuous and non-derivative genesis, one that escapes both causal logic and developmental schemes. The impetus to recover this term from medieval Scholasticism arises from a critical engagement with Konrad Lorenz, who—dissatisfied with the available terms to name the arrival of the new—resorts precisely to fulguratio. In dialogue with Nicolai Hartmann, fulguratio is thematized as an ontological leap: a founding act that introduces a new level of being without depending linearly on those below, while nonetheless preserving a connection with them. To this theoretical background, Leibniz contributes a grammar of the possible which, though grounded in continuity, nonetheless allows for fissure as a real modality of emergence. All the thinkers here gathered share a theoretical mission: to carve out conceptual space for the logic of the leap, while remaining attuned to the universal rhythm from which that leap takes off.