Stat gain potions
If the stat is below 18, a stat gain potion has a 75% chance of increasing it by 1 and a 25% chance of increasing it by 2.
Stat between 18 and 18/98 gains approximatly 1/8 th plus random(1/8th) of the amount needed to go to 18/100. This canot increase the stat above 18/99.
Example: Stat at 18/20 gets 1/8th of 80 (the amount needed to get to 18/100) plus random that i.e. 10+1d10.
Stat at 18/98 or 18/99 just gains one point.
Hold Life
Hold Life gives a 75% chance to not get exp drained by nether attacks, message "You keep hold of your life force!". It also reduces the amount of exp drained.