An Extended antifire(4) is a potion made by mixing a Lava scale shard in an Antifire potion(4). This requires at least a Herblore level of 84 (or 74 using the Pioneer ability), granting the player 5500 Herblore experience (or 1100 if they are playing an Extreme gamemode, excluding any experience boosts).

1 dose2 dose3 dose4 dose
Extended antifire(1)
Examine1 dose of extended anti-firebreath potion.
Properties
TradeableYes
EquipableNo
StackableNo
NoteableYes
OptionsDrink, Empty, Drop
Values
Value110 coins
High alch66 coins
Low alch44 coins
Weight0 kg
Auction
Last price [1]ERR
Advanced data
Item ID? (edit)

You can decant potions together to combine their dosage, or talk to the Herbalist at home to automatically decant all of your potions for you (including in noted form) for a small fee.

Creation

Requirements
SkillLevelXP
  Herblore84 (b)5,500 [2]
Members
 
Ticks3 (1.8s)
Materials
ItemQuantityCost
 Lava scale shard1208
 Antifire potion(4)19,530
Total cost9,738
 Extended antifire(4)1N/A
  1. ^ "Last average price". RuneRealm. "This price is a weighted average based on actual purchases on the in-game auction, however the wiki's prices only get updated from in-game changes every few days."
  2. ^ "Experience boost". RuneRealm. "The experience shown is for players on the normal gamemode, without any other experience boosts active."