On Karg:
http://everquest.allakhazam.com/db/npc.html?id=3611
"Im not so sure about the long time between spawns listed above. Yesterday I was doing the lupine claw quest and was able to track Karg 3 separate times in 4 real time hours. I did the claw quest twice and he disappeared both times. I'm not sure if doing the quests increases his spawn rate or if he spawns more frequently than people realize. "
From 2000 on multiple spawns in a short time period.
"Last night 2 people spent all day camping for him. Then someone killed martyr and he spawned about 15-30min later. About 45 min after that martyr spawned again my groupie was his target he ran him to snowflake's group and had him killed. again 15-30 min later karg spawned this time i got 2 polar bear cloaks then a highbee killed him. A third time martyr spawned a highbee took him out just after he ripped me up. Then about 15-30 min later karg was spotted at the north tower all of these were seen near the north tower on the innorruk server between 7pm and 10pm systime not sure exactly we were camping the orc shamans"
Another from 2000 saying they were both up at the same time and fighting each other!
"First he is Even at 35th lvl.
Second, Martar is definitely NOT a place holder for Karg. I've seen them fight. Karg of course won hands down. He's not too tough if you kite but hand to hand he's rough.
Also, he's not a rare spawn but seems to come in waves. I've Killed him three times in an hour before, while killing Martar twice in the same time. I've also looked for him for hours and not seen him. "
Another person killing Martar 3x in an hour:
"Ok, i have been trying to find Karg and have had no luck what-so-ever. I'm trying to get the Werewolf Cloak quest done. Spent 4 hrs again last night running in circles, but no spawns. But Martar popped up three times in the first hour that i was on, killed him each time and after that he never spawned again either. Another player said that both Martar and Karg are just random spawns and you never know when. Anyone have any other opinons on this theory? By the way, Martar was blue to my lvl40 druid, so atleast i am still getting some exp out there."
I saw someone's post that said he despawns after you turn in quest items but this one refutes it (and again mentions both being up at the same time):
"Had the fortune to track both Karg and Martar at the same time in EF a few days ago. There is doubt among some that they can spawn simultaneously. They can.
Interestly, Karg dropped TWO of the big GZ swords. Surprised me anyway.
Another time with a lower level character, I was able to negotiate 3 of the Polar bear cloaks off of Karg, who then continued on his merry way, not despawning."