How to get potion of luck 3

[ChakriTheGamer]

Respected Pika network,
I am trying to make potion of luck on op lifesteal whenever I put block or emerald in it and put redstone it only gives potion of luck 1..
Please help me with this..

Ign,
ChakriTheGamer

 

[HeroCap99]

Use crying obsidian to increase luck (1-2,2-3)