It's been on mine for a while, don't think it leaves unless you leave clan or loose a EE war which bumps your spell down one level
2 weeks, winning another estoc war though will start the clock over along with raising the level. Losing a war will drop you a level, but restart the clock to 2 weeks again. Leaving a clan will drop you a level, but will not reset the clock.
2 weeks. Or if you lose, then it's gone/drops a lvl. If you win, it gets extended to two weeks again and goes up a lvl
I think they should make it a permanent . Because we fought our butts off to get it. That's just total ********.
It's a four hour war! How is THAT working your butt off? Be happy you have what you have, don't be a noob and complain because you want more!