Hi guys excuse my english. I have a doubt

When a Shadow card force heroes to discard down to five cards, ¿where this cards should be placed?

1) ¿in some of 3 pools (if is this case what should be the pool) ?

or maybe

2) ¿ discard the cards for the rest of game (meaning this is remove permanent life of the heroesfor the rest of game) ?

Thankyou

When the text simply sais that a player must discard Hero cards, they should be discarded to the rest pool.