Hello,
with reference to
Mox Amber, my understanding is that “The word ”legendary“ in ”legendary creatures and planeswalkers“ refers to both creatures and planeswalkers”", as reported here:
http://www.cranialinsertion.com/article/2657So should a player somehow control, say, a white non-legendary planeswalker, they couldn't get white mana from Mox Amber.
However, the card is worded differently in Italian, i.e. “Aggiungi un mana di un qualsiasi colore tra quelli dei planeswalker e delle creature leggendarie che controlli.”, and seems referring explicitly to “planeswalkers and legendary creatures”.
Which version is correct?