A pile of speedup is an item in Evony TKR (The King's Return). It can be found after killing certain monsters or bosses, with some of them listed below.
The description of Pile of Speedup in Evony TKR says:
Pile of Speedup is known to drop from a number of bosses or monsters upon killing, including Junior Cerberus.
Note: This list may be incomplete.
Pile of Speedup opens up to all of the following items: