I don't see how goblins fit that bill at all.

1) far away from where there would be enough goblins to really constitute a horde
2) Goblins, while they do swarm, are very intelligent about it. Heck, they have repeating crossbows, so obviously they have both a front line and a back line (back line archers). And swarms are directed by goblin dragons, which there really definitely should not be one around
3) There's no reason for the horde to attack us. They would arrive, realize that they're too late, and leave. Especially since Dssialii is there to wave em off all like "Sorry, party's over, it was just the big bad guy and the physical manifestation of the gods."
4) A goblin horde would murderate us horribly, if they decided to attack us for whatever reason. I thought I made that especially clear in the race bio: if you attack one of them while they're investigating the place (since you'd have to be the one to instigate something, since they couldn't care less about our group), then they will ALL attack you. If you don't die, then MORE goblins will come attack you, and if you don't die, then EVEN MORE goblins and a goblin dragon will come and you will have died the first wave anyway.

So, inciting a fight with goblins is a bad idea, which would ultimately only lead to your characters' character growth in that they would go from living to dead.

Why not make up a new race to come get their socks beaten off of them?