Soul rings
Optimum spirit ring configuration for a Titled Douluo: 2 yellow, 2 purple, 5 black. Anyone with white ring has sub-optimal configuration and anyone with a red ring is considered a peerless talent.
The rings age and colour are as follows:
0 to 9 yrs: No Ring
10 to 99 yrs: White Ring
100 to 999 yrs: Yellow Ring
1,000 to 9,999 yrs: Purple Ring
10,000 to 99,999 yrs: Black Ring
100,000 to 999,999 yrs: Red Ring
200,000 yrs: Orange Ring(special case)
1,000,000 yrs: Gold Ring