Complete Runes

Wait a minute...what does this mean for my Domains?

William asked the System to do the math for him this time, since it would solve simple math problems for free.

-Each of your Domains will cost 10 Mana to open, then an additional one Mana per second until it is closed. Your Mana Regeneration is 48.8 Mana per minute while in combat if holding the Mana Gathering Staff, meaning you will lose 11.2 Mana each minute not counting the initial opening cost that a single Domain remains open.

William already knew the first part, but the System reiterated it anyway.

System, how long would it take for me to run out of Mana if I had all five Domains open? 

-With five Domains open, you will lose 50 Mana immediately, then 56 Mana per minute. At this rate, you will run out of Mana after 36 minutes and 36 seconds.