If you're hunting Champion scrolls and happen to be looking for the Earth Warrior Scroll, I got 5 in my dungeon. - RSN Leaf Green : r/runescape
Elite Dungeons drop Champion's Scrolls even if you've completed them : r/ runescape
Alexander on Twitter: "Lesser Demon champion scroll! (Somewhere over 20k kc) 2 more to go, Imp and Jogres. =) #RuneScape https://t.co/tnqxsy9iy7" / Twitter
Goblin scroll best AFK spot 1000 kc/h minimum : r/runescape
Champions' Challenge - OSRS Wiki
Loot from Goblin Champion's Scroll on W2 @ Port Sarim Lodestone : r/ runescape
Champion Scroll drop from an IMP. - YouTube
Just hit 50k imp kills dry for the champion scroll. I'll put some more info in the comments : r/2007scape