Sadly yes, your highness. However, I know first hand that resurrection is possible, though draining and dangerous to those involved in the ritual.
I would imagine others have had this idea already of course, especially since I know Aratain was summoned here, and he performed the first resurrection that I ever heard of. Along with the help of some others, of course.
Note that before you get any ideas, I would STRONGLY encourage you to plan a ritual very carefully before you try one. I haven't recovered from that last one, about a year later, and I was only a minor participant, helping to bring back a fairly minor hero, no offence intended to the individual. Threan was quite powerful, so I'd imagine that to maintain the balance, even more would be asked for in return.
Of course, I know little of magic beyond what I have witnessed, and what any intelligent mind can figure out for themselves.
So then he goes, YOU SHALL NOT PASS, and I say "I've got WINGS? I can FLY?" It was hilarious! The dwarf was tough, but the elf was delicious and they had some men and these four bite-sized guys, too. The wizard was fuming when I flew off.