Fast heister fusion question

Can someone explain the fusion procedure. I have 2 raijin spirit tools rank 3 and both are at Max fusion. I.want to get rank 4 and fuse those both for a rank 5. It says you need 1st 3rd & 5th fusion. Anyone help please.

If you have it at max fusion, just go to the chalanges (small round button down on the start screen under which is writen challanges) and find the challange with the raijin spirit. Press on it and then press claim to get one 4-rare raijin spirit. Do this 2 more times and then fuse the 3 4-rare silver raijin spirits. Go to the challanges again and find the other one with the raijin spirit. Claim your 5-rare golden raijin spirit. Your time for this challange is running out so do it quickly. Hope this helps!

Omg It was that simple! Thank you so much. Is there a +rep button I could give you? Lol

Unfortunately, there isn't one