bag of fabrication

to use roll a d20 and look at the table 

1.cast cloudkill centered on you 

2.cast fireball centered on you 

3-4.make a poison potion 

5.-15 make an object of too 100 gp in worth 

16.create a bag of 200 gp 

17.create any potion 

18.create 1d6 scrolls of spells you can cast 

19.create a common magic item 

20.create a uncommon