To become DIO, find the Stone Mask in the chest in the woodland mansion.
Right click the mask to wear it.

After becoming DIO, you will get 4 skill items: Knife, The World, Road Roller, Time Stop.
Right click on the skill items to use them.

Also you will have strong effects: strength, speed, jump boost and regeneration.

---

Introductions

1. Knife: Throw a knife forward to attack mobs.
2. The World: Summon The World in front of you and rapidly attack mobs using its fists.
3. Road Roller: Jump up and throw a road roller to the ground to attack mobs. (CD for 20 seconds)
4. Time Stop: Stop the time for 9 seconds. (CD for 20 seconds) (Some entities like squid or fireworks will not be stopped due to technical problems)

If you use Road Roller in the stopped time, you can attack the road roller to increase the power of it.

---

Updates

• 5/24

1. End rod is no longer used to activate Time Stop animation.
2. FPS lower than 400 is now allowed.
3. Force Unicode Font must be set to OFF.
4. Changed a bit on Time Stop animation.

---

Notes

1. You must set FPS lower than 400 to have the right Time Stop animation.
2. Force Unicode Font must be set to OFF.
3. There can be more than one DIO player, but only one The World at a time.
4. Optifne is NOT allowed
5. Try this resourcepack if you can't see the animation: https://www.mediafire.com/file/13k97d04d6ke3hx/DIO_resource_pack.zip/file

You can run the following command to locate the mansion.
/locate MansionOr run the following command to get the mask directly
/give @s minecraft:carrot_on_a_stick{CustomModelData:1,display:{Name:'{"translate":"Stone Mask"}'}}If you lost your skill items, run the following command to get them back.
/function dio:sikame/finish

The file includes data pack and resource pack, make sure you have installed both of them.

Data pack is NOT a resource pack!

**How to install a data pack**
https://minecraft.gamepedia.com/Tutorials/Installing_a_data_pack
I will answer no more question about why the mask is not working.