Upkeep… per second?
Quoting skill mastery upkeep costs in mana is like measuring fuel economy in gallons or liters instead of MPG or km/100L. It just doesn't make sense. Mana/s would be better, like "Upkeep Cost: 20/s" instead of "Upkeep Cost:20" (and you should add the missing space while you're in there).
I tried to confirm it was per second on the wiki but couldn't. In fact, most of the skill masteries didn't even have their values listed there: https://uo.com/wiki/ultima-online-wiki/skills/skill-masteries/
I tried to confirm it was per second on the wiki but couldn't. In fact, most of the skill masteries didn't even have their values listed there: https://uo.com/wiki/ultima-online-wiki/skills/skill-masteries/