Demon Dolls Invasion happens about once a month in Hero Wars Dominion Era
When Does the Demon Dolls Invasion Happen?
This event happens roughly once per month, though there isn't any set schedule or time of the month that it happens. It's happened once a month all year long (2024), but happened twice in October!
This event usually lasts for 24 hours and appears rather randomly these days. On rare occasions, it can also last 2 or 3 days.
What are in Demon Dolls?
Every Demon Doll has a ~40% chance to open into MORE Demon Dolls. The math works out in a way that you will roughly TRIPLE your total dolls!
For example: if you have 10 dolls, you open roughly a total of 30 dolls.
Here is the list of contents for Demon Dolls, via the Hero Wars Wiki
Note that the official drop rate % for each item is not published anywhere, officially!
2 Demon Dolls
2 Hero Soul Stones (Martha, Dorian, Celeste)
1 Chaos Core
1 Great Enchantment Rune
2 Rare Enchantment Runes
3 Chest of Defender, Marksman, or Support Titans
25 Chaos Particles
50 Arena, Grand Arena, Outland or Tower Coins
50 Friendship Chips
100 Artifact Coins
300 Pet Potions
300 Titan Potions
50,000, 250,000 or 500,000 Gold
1,000,000 Gold + Avatar
Should You Participate in the Demon Dolls Invasion?
The only time it's a good idea to participate in a Demon Dolls Invasion beyond what you'd normally spend in a day, as far as extra Campaign Energy, is when it aligns with an event that you can also take advantage with a "Spend Energy" task.
The Path of the Warrior is the active event during the November 6th Demon Dolls, and it does have a Spend Energy Task; however it's not a great one.