Retrieving a casket for Solvunn would definitely earn Tony a fair amount of favor and potentially give him a chance to pitch a plan for its use to the Council, though it's worth noting common wisdom holds that a single casket contains power enough to sustain the Singularity for an entire year, and Solvunn may have plans of their own.

If Tony is successful in retrieving a casket and you would like to pursue this further, please hit us up on the Plotting Post where we can work through any specifics with you!