Only one bat in Dalugronk is capable of carrying Orcs, and it's next on Elta's list.
'The next target is a giant bat in the Orc village Dalugronk, to the north-east at the bottom level of Deepscrave. The Orcs there are trying to ride bats like the goblins, but only one can carry them. Not well enough to fly far, but I'd hate to find out what can happen next. I suppose I'll name it... Sumri.
'Luckily, Sumri is a disobedient beast; the Orc beast-masters must coax it with spiders. You could find a few spiders from some of the beast-masters and then lure Sumri out yourself.
'Once you're done, meet me outside the village -- I'll be nearby to the north-west, watching the worm nest Shataz-kordh.
'Curious about the bat's name? Well, let's make a deal: bring me the bat's fur, and I'll tell you.'
The Orc village Dalugronk is located on the lowest level of Deepscrave, to the north-east of AslĂf.
The Orc beast-masters may have bait that you can use to lure out the bat Sumri.
You have obtained bait to lure Sumri out.
You have defeated Sumri.
Elta waits for you nearby to the north-west, watching the worm nest Shataz-kordh.