YA Fantasy, modern. Siblings go through realms to collect magical items like a phoenix feather and a block of gold. Read around 2015.

[Jenna]

Young adult novel about 3/4 siblings who travel through realms to get magical items for a quest. The oldest boy's future self tells him to look out for a certain group of people who later in the story cut him on the arm. Some of the items they have to get is a phoenix feather and gold they have to collect to unwind a curse or make a spell

[Kris]

Jenna, around what year did you read this book?

Story's time period and location (where do the siblings live)?

What allows the siblings to travel through fantasy realms?

[Jenna]

It was around 2015 when I read it and it was modern I think but honestly thats all I remember about it