My Invincible Index Finger

*When he had transmigrated into this Xianxia World , he became completely speachless...
Other people had transmigrated with all kinds of invincible Cheating Item, and had the so many legendary opportunities... 
But his cheating item was actually his right index finger!
Just when he was in despair, this strange index finger revealed a mysterious ability. 
He realized that his fingers were the real big shots in this world! 
"What?! I don't have enough spirit stones? Don't panic, let's see if one million spirit stones is enough for me to use my fingers to turn them into spirit stones." 
" Still lacking a thousand-year-old spirit grass? Wait, just give me a random weed. I'll turn it into a spirit grass."
"Ten thousand year spirit grass? " 
"Oh? You are the number one powerhouse of the Back Blade Sect? Wait, I'll enlighten Blackie. We'll talk about it if you can beat my dog!"
Now with such power could him step by step became the greatest cultivator in this world?