A 100k gold is an item in Evony TKR (The King's Return).
The description of 100K Gold in Evony TKR says:
Use it to gain 100,000 Gold.
100K Gold is known to potentially be obtainable from opening Senior Spring Festival Rewards, Medium Spring Festival Rewards, Junior Spring Festival Rewards, Lv11 Boss Monster Chest, Lucky Box Ⅶ, Lv12 Boss Monster Chest, Lv13 Boss Monster Chest, Lv14 Boss Monster Chest, Lv15 Boss Monster Chest, Pile of Gold and Bulk of Gold. The links for each item are below:
Note: This list may be incomplete.