Temp leagues should have advanced rewards

I got an idea
Give an exclusive mtx orb per an account for each temp league
Which can immortalized just one item keeping to new leagues forever
Unused mtx orb for each league will be destroyed
You may get an additional mtx orb next league
But only one item per account can be immortalized
Otherwise this will be replaced to new mtxed item
For hc, regardless of mtxed immortalized item or not it goes to standard when u killed
Just an idea to keep players bein motivated 4 temp leagues