Blushing Spiderling 

Blushing Spiderling
Binds when picked up
Use: Teaches you how to summon this companion.
Binds when picked up
Use: Teaches you how to summon this companion.
Uncommon
Yes

Ground
Twitches legs.
Unknown
None
3 allowed
Shadowlands
Patch 9.0.2 | Posted: October 13, 2020
To spawn the rare creature that drops this pet, players must destroy all egg sacks in the area around the webbed NPC, Funguss. After defeating waves of spiders, the rare mob will appear.
Level 0:
0
0
0



1-1 of 1
1-1 of 1

So how does one obtain this pet when the rare it drops from has been bugged since launch, you get one shot at getting it because once you kill the rare for the first time you are SOL after that. Any subsequent kills don't receive loot and the game treats it like you have already killed the rare that day (no silver portal around it's name-no loot)