It has an unlimited duration and can be taken from the minion at any time, without being destroyed. It is currently the second most efficient infinite fuel source, after the Everburning Flame.
Daysⓘ to acquire 204,800xCoal using a Coal Minion (By tier, No fuel, No Minion Upgrades) If the player has multiple minions, divide the number of days by how many minions will be used.
I
II
III
IV
V
VI
VII
VIII
IX
X
XI
XII
71
71
61
61
56
56
47
47
42
42
33
28
Enchanted Iron[]
Daysⓘ to acquire 1,920xIron Ingot using an Iron Minion (By tier, No fuel, No Minion Upgrades) If the player has multiple minions, divide the number of days by how many minions will be used.
4
Added Plasma Bucket.