For everyone's information, you may use feats, classes, prestige classes, Skill Tricks, spells, weapons, or anything else you can find as long as it comes from a book that WotC put out. Including rules from any of the Worlds they have created.
The only thing I would like you to consider is not mish-mashing all these options from the various worlds. If you have picked a class or feat at 1st level that came from Forgotten Realms then it is likely that your character is from Faerun and shouldn't start picking feats from Eberron. It can happen but I would like you to explain how it happened. In certain places like Cantus it will be fairly easy to find someone to teach you. But you're on a different world right now so it would be very difficult to pick up a feat from Dragonlance. But that does place you in a position to learn new feats from this world. More about that later.
So yes Nacesh can pick up Ice Knife and you may even become exposed on this world to completely new spells that you might end up liking better. That's why I allow people to retrain feats, spells, skills and even classes. But it's not free. It could cost you coin or something else.
Most new feats on this world are Exotic Weapon feats for weapons that you will likely be exposed to during your short stay. As for spells, I don't want to go into it too much right now because I don't want to spoil any surprises. But this world does have a unique take on magic. For example, in regular D&D worlds magic is split up into different schools such as Evocation, Illusion, etc. In this world magic is split up differently. Some categories are simple such as this Frog-man's Watercraeft (water magic) while others may be a little less recognizable...
The only thing I would like you to consider is not mish-mashing all these options from the various worlds. If you have picked a class or feat at 1st level that came from Forgotten Realms then it is likely that your character is from Faerun and shouldn't start picking feats from Eberron. It can happen but I would like you to explain how it happened. In certain places like Cantus it will be fairly easy to find someone to teach you. But you're on a different world right now so it would be very difficult to pick up a feat from Dragonlance. But that does place you in a position to learn new feats from this world. More about that later.
So yes Nacesh can pick up Ice Knife and you may even become exposed on this world to completely new spells that you might end up liking better. That's why I allow people to retrain feats, spells, skills and even classes. But it's not free. It could cost you coin or something else.
Most new feats on this world are Exotic Weapon feats for weapons that you will likely be exposed to during your short stay. As for spells, I don't want to go into it too much right now because I don't want to spoil any surprises. But this world does have a unique take on magic. For example, in regular D&D worlds magic is split up into different schools such as Evocation, Illusion, etc. In this world magic is split up differently. Some categories are simple such as this Frog-man's Watercraeft (water magic) while others may be a little less recognizable...