Unluckily Lucky

Some people are Lucky. Others are Unlucky. You? You're an interesting case where luck seems to fluctuate. Every Long Rest you will roll a D4 for four Luck Dice you can use for any failed check, attack, or saving throw. You can receive expended Dice on a Short Rest depending on how long it is. For example if you only rest for one hour you get one Luck Die. The kind of Dice you get, depends on the D4 at the start of each day.

1=D6

2=D8

3=D10

4=D12