Forum:Exodia TUFL and nercovalley effect

im just wanted to make sure if im using these card correctly:

first i wanna use both exodia TUFL and nercovalley.

i want to use nercovalley effect in protecting my exodia piece in the grave and i want to be able to summon exodia TUFL and a second one if the first gets killed. so does the order of the cards play matter ? and also hows should i play these cards be played correctly?

srry if im asking this im a novice at rulings and order of the cards play.