No, planeswalkers are not considered players in the game of Magic: The Gathering. They are a type of card that represents powerful characters in the game, but they do not function as players themselves.
Yes, planeswalkers are considered legendary in Magic: The Gathering.
No, planeswalkers do not count as creatures in Magic: The Gathering. They are a separate card type with unique abilities and characteristics.
Yes, lands count as permanents in Magic: The Gathering.
No, copying a spell in Magic: The Gathering does not count as casting it.
No, infect does not count as combat damage in Magic: The Gathering.
Yes, artifact lands count as artifacts in Magic: The Gathering.
Yes, artifacts count as colorless spells in Magic: The Gathering.
No, destroying a permanent does not count as dealing damage in Magic: The Gathering.
No, transforming a card in Magic: The Gathering does not count as entering the battlefield.
Yes, planeswalker abilities count as activated abilities in Magic: The Gathering.
Yes, Phyrexian mana symbols do count towards devotion in Magic: The Gathering.
No, lands do not count as spells in Magic: The Gathering. They are a separate card type used to generate mana to cast spells.