Wist ik niet. Very confusing allemaal.
Speler 1 heeft een planeswalker
Speler 2 casts Earthquake.
En dan? Leg ne keer deftig uit jom
Edit: gevonden. Man man, dat wist ik dus ni.
Q: How is damage dealt to a planeswalker outside of combat?
A: If a spell or ability your opponent controls would deal noncombat damage to you, that opponent can choose to have all of that damage dealt to one of your planeswalkers instead. So if your opponent Shocks you, that opponent may choose to have that Shock deal its damage to one of your planeswalkers instead. This is a replacement effect that is applied as the damage is actually dealt--they don't make the decision until the spell or ability is resolving and the damage would actually be dealt.
Note that only your opponents can do this--you can't have the damage from a spell you control be redirected to one of your planeswalkers. And this redirection only applies to noncombat damage, so your opponent can't attack you and then redirect the damage to your planeswalker. If he wants to deal combat damage to one of your planeswalkers he has to attack that planeswalker.