Barroth Armour get! And let me tell you, fertile mud is a bugger to get a hold of! The Barroth rolls in mud to armour itself and if you hack this mud off during combat, there’s a chance it’ll drop a sparkly – and there’s a chance (a small one) that this sparkly will be fertile mud.
But most of the time it isn’t.
You can also get fertile mud as a quest reward, with a much higher drop rate if you capture, rather than killing the beast.
You need eight (I think) fertile mud for the full armour set and I reckon the best way to get it is to grind the ‘hunt a Barroth’ three star quest. Took me four or five runs to get it all. Now that I’ve done that and fitted the armour with ThunderRes decorations, I’m ready to have another go at the Lagiacrus. Once that’s out of the way, I think most of the remaining quests are in the Tundra. Barroth armour has a nasty -10 to ice attacks, so I’ll be swapping back to Jaggi armour (or making something better) before long. Saved armour sets for the win.