Tenacity

Each player is now given a tenacity rating based on 3 main components:

   Raw Tenacity — Your ability to survive in games to the end.
   Daily Grind — Your ability to complete turns consistently and quickly.
   Rescue Factor — Bonus tenacity is given if you play as a replacement commander and do well.

Tenacity - The True Measure of a Commander
Planets Magazine Tenacity
Leaderboard Tenacity