  We construct $F(T,\left(\nabla{T}\right)^2,\Box {T})$ gravitational
modifications, which are novel classes of modified theories arising from
higher-derivative torsional terms in the action, and are different than their
curvature analogue. Applying them in a cosmological framework we obtain an
effective dark energy sector that comprises of the novel torsional
contributions. We perform a detailed dynamical analysis for two specific
examples, extracting the stable late-time solutions and calculating the
corresponding observables. We show that the thermal history of the universe can
be reproduced, and it can result in a dark-energy dominated, accelerating
universe, where the dark-energy equation-of-state parameter lies in the
quintessence regime, or may exhibit the phantom-divide crossing during the
cosmological evolution. Finally, the scale factor behaves asymptotically either
as a power-law or as an exponential, in agreement with observations.
