A 10 minute speed up is an item in Evony TKR (The King's Return).
The description of 10 Minute Speed Up in Evony TKR says:
Reduces remaining time on a timer by 10 minutes.
10 Minute Speed Up is known to potentially be obtainable from opening Lucky Box Ⅱ, Pile of Speedup and Bulk of Speedup. The links for each item are below:
Note: This list may be incomplete.