| I'll add that this is probably a balancing issue. At level 10, you shouldn't be able to reliably use high level spells. No game allows you to do that. Of course, most games make it very clear what requirements are needed to cast a spell.
Also, I bet you haven't actually found the deathlord spell so that you would know the ingredients. This is a major oversight on the developers part. If you have played before or have access to a list of nether spells, then you can mix any spell in any quantity that doesn't require a homunculus head as soon as you reach Skuldoon. Talk about bad planning. Personally, I start using poison cloud as soon as I reach Fargrove.
On deathlords, I have successfully used them in Naga Temple with a character level of more or less 14 and very low nether skill, maybe 3-4. |