Doesn’t seek uncontracted Magia
Instead contracts “ruined” Magia who were either killed by or as Witches and had Labyrinths close behind them as per Kyubey’s contract (which would essentially be terminated/null by then because all the clauses were fulfilled), or Witches who were “purified” back to a semblance of human form
Actively manipulates space-time to “recover” such Magia with further karmic potential with minimal risk of entropy
Contracts typically change abilities somewhat and give their clients different tasks generally meant to help return to normalcy if desired, while maintaining the timelines in the process
Supposedly temporary contracts, although some stay permanent out of their own prospective heroism
Everyone else still presumes the client died prior until they reveal themselves
Has a boss named Madokami to make this all happen
Probably some extra details I have yet to write here