OPTIONAL OF COURSE(Maybe toggleable with a day's worth of cooldown?)
Maybe hunger?
-Gotta eat that food from time to time, or you get a debuff to vigor.
-Have to eat little in lower levels; in higher levels, either more food or more powerful food.
-Reason to level cooking; reason to level fishing as well (Easy food).
Maybe thirst?
-Gotta drink that water from time to time, or you get a debuff to spirit.
-Have to drink common water in lower levels; in higher levels, more water or higher tier water.
-Reason to level cooking.
Maybe sleep?
-Gotta hit that /Sleep once in a while, or get a debuff to
-A second of sleep for each level; on level 60, have to sleep for a minute.
-Using a tent or sleeping indoors gets you a buf "Sleep well"(Name not final of course).
ABOUT SURVIVAL SKILL.
-Maybe add temporary placeable workstations? (Like anvils or whatever, still have to have reagents to make them)
-Sleeprolls (For RP reasons and bonus for sleeping/having to sleep less)
-New tent designs? (Only cosmetic difference)
-Logs to sit on (Like chairs, for RP purposes)
I'm going to end here for survival skill to not enter the infamous "Player housing" territory...
Would be nice.
