Heroic Intervention clarification
Hi,
Indestructible doesn't work very well with planeswalkers. While it prevents them from being destroyed by something like the Never half of Never//Return, it doesn't help with damage. Being dealt damage as a planeswalker still causes that many loyalty counters to be removed from the planeswalker, and a planeswalker with 0 loyalty is put into the graveyard. This is not destruction, so being indestructible won't save it.
And with the planeswalker redirection rule, the planeswalker is never being targeted by the redirected damage (it's just a choice that's made as the spell or ability is resolving), so the planeswalker having hexproof won't prevent your opponent from being able to redirect noncombat damage to it.
Thanks,
Nathan Long
Magic Rules NetRep