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I will present a literature review of the Magnusian, which was a lively topic at the recent Nordita program on gravitational waves. The Magnusian connects scattering amplitudes to observables with a well-defined classical limit, and addresses open questions related to formulation of a unified description of scattering and bound orbits in compact binary dynamics. Classically, the Magnusian is a function on the phase space that evolves a system from an initial state to a final state in the form of an exponential of the Poisson bracket. Quantum mechanically, it is related to the exponential representation of the S-matrix. I will discuss these properties and outline the connection between the Magnusian, the eikonal phase, and the classical on-shell action following the work of Kim et al. [arXiv:2511.05649], in which the authors find a non-trivial relation among these quantities. This will be done in a pedagogical fashion from the perspective of a learner, and input from the audience will be highly appreciated.