CommentStreams:Eb663e337a0704bd8a4ee15272371aef

Edited post: i posted the wrong cards (epics instead of legendary cards), of course it was a mistake..

it's not mandatory to get the LE at CL3. you can get one of the :

Red Hood

Cultist

or some other legendary cards that has the lowest duplicate number...except those above that drop in a chest at a league higher than your current league.

for epic chests you can get:

Dark Priestess

Vampire

Light Angel

Driada

Elven Elder

Alchemist

Elemental Hunter

The cards that drop is usually the card with the lowest number of duplicates.