now obviously withered grass can be used in the compost bin, or tilling it into the soil to make it healthier, but while I'm sitting here making a bunch of unshipped weapons and then upgrading them with crap, like scrap, iron, etc, I eventually ran out of said crap. so I decided I'd reforge with weeds. weeds are apparently even more efficient than iron, btw, and you should start with a level 5 weed, then 4, then 3, then 2, and then the rest are all 1. that way you only spend 50 rp on the 1st 5 "upgrades". anyway, back to the main point. I ran out of weeds, and I have a ton of withered grass, so I figured I might as well use it.
well, on every upgrade I noticed that it does -1 vit, which makes sense, i guess. however, on my 3rd and 8th reforge with withered grass, something else rather odd happened. on the 3rd reforge, I got +10 ATK and +5 MATK, and on the 8th I got +15 ATK and +5 MATK. Also, when I ran out of weeds, I was in the middle of upgrading a weapon, so I upgraded it with withered grass, and I also got the +10 ATK and +5 MATK on my 2nd reforge with withered grass (those were the last 2 reforges I had done). So I'm not sure what causes the boost in atk and matk, but withered grass seems to behave oddly when used in reforging. the item looses 1 vitality every single time, without the effect being halved/nullified, and it seems rather random when it gives me the bonus atk/matk. anyone else wanna expand on this?