Golem 10% magic res for every 200 conversion unlocked by feeding it a spell glyph found in doubledoom
Goo Blob/ Goo Man 10% physical res for every 200 Unlocked by feeding it a physical item Found in Grimms Groto
I'm hesitant about races that grant +resist. We've already got a bunch of +resist items, boons, and classes. With the 65% stacking limit that can already be reached by classes that start with 0 resist, that could be a problem.
Efreet fireball potion (+1 fireball damage for next 3 fireballs) 100 conversion points unlocked by beating lev 10 efreet boss "Cheiftan Spellbane" found in the place with the avatar (The name escapes me)
Demonic Library is what you're thinking of. That fireball potion you've described is ludicrously weak, and I presume you mean +1 fireball damage per level
for next 3 fireballs. Even with this consideration, this is just a weaker version of a mana potion, which can be used to cast any spell
you want. A gnome can scoff down a mana potion, and if he's raised his mana to 15 (easy if Dracul is on the field) that will give him enough mana to cast fireball again. The extra fireball a gnome would receive by drinking a mana potion would exceed the bonus damage from the fireball potion, and that mana potion could also be used to fuel other spells instead if fireball wasn't the preferable option.
Naga Poison vile (weaken enemy 1 damage per level when hit) 150 conversion points unlocked by helping naga avenge his father (Beat the boss and give trophy to him) found in first naga area (name escapes again. has ruins and revanants boss setho)
work as a racial effect, though it'd be pretty worthless against any hard-hitting boss (which is the majority of them on hard and vicious)
Dragonborn extra 1 hp per half level and 5% attack boost per 90 conversion points
Er, what? Nah, just bring back the half-dragon from the alpha.
Vampire 5 lifesteal per 100 conversion points
Looking forward to see how they rework this monster class. Converting for lifesteal sounds delicious and novel, since in the current build there's basically no way to stack an appreciable amount of lifesteal (Dracul is no longer farmable for piety, so it just doesn't work).