At the end of this year, Sunreaver Spy (and some of Rise of Shadows) will have been in standard for 4 consecutive years (I think the longest of any non-classic card) :
19.6 Patch Notes - Alura Nerf, Battlegrounds & Duels Balance Changes, Barrens Pre-Purchase, Vol'jin Legendary Card Given Out For Free - Hearthstone Top Decks
The Best Hearthstone Budget Decks (July 2021, Forged in the Barrens) | by Ville Kilkku | Just Hearthstone things | Medium
Sunfury Protector - Hearthstone: Heroes of WarCraft Wiki Guide - IGN
History of Nerfs [from Alpha till 15/12/20] : r/hearthstone
Sunfury Protector - Cards - Hearthstone
Descent of Dragons is the new Hearthstone Expansion - Wowhead News
HearthStone: Carte dorée Protectrice solfurie (Sunfury Protector golden card) - YouTube
Hearthstone Esports on Twitter: "Which deck would you choose to win this match up? @polymtl's Warlock or @UNC's Paladin? #Hearthstone >https://t.co/SWPQb7AWTL https://t.co/psgGYQg6A0" / Twitter