I think Cockroach soldiers. They're lvl 83 and can be found in the underground jail in Edgeville.
Waterfiends.
For members, flesh crawlers drop dust runes, which are a combination of air and earth runes. For free users, I'm not sure. Needs update.
Black dragons is the best!
Mostly Fire runes but Law runes and Air runes are not far behind them.
The monsters that drop law runes are the giants (all) Catablepons and dark wizards. If don't won't to kill thaws u can buy then in wildy at magic shop.
I presume you was referring to the Draconic Visage. It drops from most if not all dragons. Mainly Black dragons and metal dragons most.
For non-members, the main source of nature runes is non-player characters that drop them (such as Dark Wizards or Flesh Crawlers), as most monsters that drop runes may occasionally drop nature runes. There is also a lava-surrounded island in high level wilderness where nature runes may be tele-grabbed from a spawn. Each tele-grab gives you 3-4 nature runes.
goblins.
Blood runes - only for members. The most powerful attack runes for non-members are death runes, described as "used for medium-level missile attacks".Blood runes - only for members. The most powerful attack runes for non-members are death runes, described as "used for medium-level missile attacks".Blood runes - only for members. The most powerful attack runes for non-members are death runes, described as "used for medium-level missile attacks".Blood runes - only for members. The most powerful attack runes for non-members are death runes, described as "used for medium-level missile attacks".
The odds are 1:1050 making it the monster that drops it most commonly. However, this doesn't mean you WILL get it after 1050 kills. You could get it on your first kill or on your 50000th kill.
Deaths runes Law runes nature runes all make you decent profit but i recomend nature runes as they are a good souce of money and xp, 1-99 runecrafting takes about 4months if u no life it or it can take 1 year if u play for about 1 hour a day lol hope this helped :)
You can obtain Chaos Runes from the Grand Exchange in Varrock for the best prices and also in bulk. It's also possible to buy Chaos Runes from Aubury's Rune shop for 140 gold pieces each, or by killing monsters in RuneScape. There are also some spawn locations for Chaos Runes with the most popular location in the Dark Warriors' Fortress.