How to make an pickup item to increase the attack damage of the main character

Hello, does anyone knows how to make an pickable item that buffs the character attack damage for a certain amount of time and then returns to normal. in blueprint or c++.

There are actually many things going on in your description and details missing. Several steps would need to be figured out. The Solution for each step can potential solve another problem.

Thus, I would break process down into smaller steps and solve each one at a time. Lets start with the first problem:

“Make an pickable item”

How is the item visualized?

  1. Text
  2. 2D Image
  3. 3D Mesh

How does the Player interact with Item?

  1. Clicking it with a mouse
  2. Pressing a key while hovering over with
  3. Colliding with Character
  4. Colliding within a distance from Character
  5. Colliding with Projectile
  6. Some combination of all of the above