First, can someone from Warmane team check if spawn timers are working for all rares in Northrend? Because there is some debate particularly about those in Storm Peaks. If there was a practical way I was going to do it, but this is not like testing a quest.
Second I have a question. Is there a restriction of spawning only 1 rare at a time in a zone? So far I have killed 3 in Northrend and they were single ones per zone.
because i am farming them, and in last month i got all except vyragosa, and if you invest a little time u can find out respawn timers for every npc, and you need to invest your time in to waiting for them for few hours
I have been camping, working on Time-Lost Proto Drake and Vyragosa for more than a year. I have killed Vyragosa and Time-Lost Proto drake 10+ times total in Lordaeron. Only one of them was a natural kill, others were after a server restart. I wanted to share my observations and help anyone reading this. First of all, it is confirmed by one of my friends that Time-Lost Proto Drake spawned naturally 2 hours after server restart at Brunnhildar Village. Sadly I do not have evidence currently for it. However, I have an evidence of Vyragosa spawning naturally without a server restart. Therefore, I can say that yes, they can spawn naturally. However, based on my observations (not with evidence) I do think there is still a phase issue about those rares. The best tip that I can give people who wants to kill Vyragosa or Time-Lost Proto Drake is that just logout on a spawn location and continue raiding/herbing/mining or whatever you want to on another character. When server gets restarted, login to your main and hope it spawned at your location.
Here is some spawn locations and kills of mine.
Killing Time-Lost Proto Drake in the middle of storm peaks just 2 minutes after a server restart: https://youtu.be/qW9uu8acKts
Killing Time-Lost Proto drake at Snowdrift Plains after server restart. In that video, Vyragosa also spawned with TLPD. You can see my guild chat that they killed vyragosa and got achievement at the same time I killed TLPD: https://youtu.be/Pfs1uGmpUVI
Killing Time-Lost Proto drake at Snowdrift Plains after server restart for a friend (Sorry for my addon sounds): https://youtu.be/6hzYMR7-8l8
Killing Vyragosa at Bor's Breath. This is the evidence of natural Vyragosa spawn without server restart. We were waiting for server restart. However, it spawned naturally xD: https://youtu.be/jHYvX6tA4Ts