It gives you 4, 5, and -2, with a rating of 12 for instability, but statistically you can get at least 2 or 3 in before a negative effect. You might even get lucky and get a 4th or 5th like I did. Both times the effect I got was "draining", which saps your ...basically useless for a warrior build. The ingredients you need for this (bronze, tin, copper) are relatively uncommon, but at least common enough for the player to get in 25-30 of these encrusts by the end of the game (full length). So even if you land a really bad instability effect, you can just find another tome or shield and try again. As you can see, this encrust made me ridiculously overpowered (on going rogue, too): You can't see it in the screenshots but I had 74 when vegan debuffs were off. With crits I was dealing 140 with each attack. I mean, I wiped out Vlad Digula in four hits with sawblades. But even without sawblades, he lost gobs of health when I threw puny darts. I say decrease the and by 1, and increase the instability by 3. And possibly require a rarer ingredient for the recipe.
