You can buy it using 40 event gold for 8000 badge = 200k reputation., event gold can only obtain via voting the site..
You can buy it using epic coins, 1000ec, ec can be obtain in events, farm it in ethernal sleep, bh, twighlight temple and daily quest
You can obtain 200k reputaion using your 1000 morai order daily quest points.
Everyday you can acuired 300 points,
Everyday you can only use 100 points to exchage for reputation pills
Every reputation pills cost 5 points equivalent to 1K reputation
Means everyday 20K reputation , equivalent to 10 days for 200K rep.
You can also obtain badge on your faction base
For every 3000 contribution points = 1000 WO badge
Means 24k contribution points= 8000 WO badge = 200K rep.
Contribution points can only obtain on base /faction daily quest
For lower level guild/faction/base you can acuired 300 con. Points a day
For high level guild/faction/base you can acuired 1k con points a day.