In a game of Magic: The Gathering, there can be multiple planeswalkers on the field at the same time, but each player can only control one planeswalker with the same subtype.
It depends on the card and the circumstances, but in many cases yes. Planeswalkers are always very good.
In a typical deck, players usually include 1 to 3 planeswalkers.
No, not all planeswalkers are legendary.
I presume that you mean set blocks? Zendikar Block has 6 Planeswalkers Lorwyn Block has 5 Planeswalkers Alara Block has 5 Planeswalkers M10 has 5 Planeswalkers (these are reprints of the Lorwyn Planeswalkers) The best planeswalkers are found in Zendikar Block: Gideon Jura, Jace 2.0, Nissa Revane and Sarkhan the Mad
Yes, planeswalkers do not have haste when they enter the battlefield.
there is no limit
To effectively target planeswalkers with spells in Magic: The Gathering, you can use spells that specifically target planeswalkers or spells that deal damage to any target. Additionally, you can use creatures with abilities that can target planeswalkers or use cards that can redirect damage to planeswalkers. It's important to have a diverse range of spells and strategies to effectively target planeswalkers in the game.
No, lifelink does not work on planeswalkers in Magic: The Gathering.
Yes, planeswalkers are considered legendary in Magic: The Gathering.
Yes, planeswalkers are considered permanents in Magic: The Gathering.
Yes, planeswalkers are considered legendary in Magic: The Gathering.