This item is acquired in-game. See its sources below.
A Rare Miscellaneous, item level 1, binds when picked up.
First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
Blizzard numbers items as they are created, so the named items next to ID 258418 (258408 to 258427) were usually added in the same batch as Gillvanas: the same quest line, zone, vendor or reward set.
Lil' Red Whirlwind ID 258408 · Weapon - One-Handed Axe
Traditions of the Haranir: Herbalism ID 258410 · Miscellaneous
Traditions of the Haranir: Inscription ID 258411 · Miscellaneous
Stormshaper's Crossbow ID 258412 · Weapon - Crossbow · item level 44
Dottie ID 258414 · Miscellaneous "Teaches you how to summon this companion."
Finduin ID 258419 · Miscellaneous "Teaches you how to summon this companion."
Ensemble: Wooly Wendigo ID 258422 · Consumable
Gargantuan Grrloc ID 258423 · Miscellaneous · item level 10 "Teaches you how to summon this mount."
Ginormous Grrloc ID 258425 · Miscellaneous · item level 10 "Teaches you how to summon this mount."
Bound Blizzard ID 258427 · Miscellaneous · item level 10 "Teaches you how to summon this mount."The raw ItemSparse values for item 258418 in the current client build.
Read from the World of Warcraft client build files: Item, ItemSparse, Lock, Holidays, AreaTable and CollectableSourceVendor.
TheWoWDB