The official term is "Standard", but because of it's controversial nature (forcing players to constantly replace their decks with the most recent sets of expansions), the format has developed the insulting (justifiably?) nickname of "Scumbag", or "Scumbag Format".
The most popular format in Magic: The Gathering (MTG) is Standard.
No, conspiracy cards are not legal in the Modern format of Magic: The Gathering.
No, Commander cards cannot be used in the Modern format of Magic: The Gathering.
Yes, a planeswalker can be your commander in a game of Magic: The Gathering if the format allows it, such as in the Commander format.
Yes, planeswalkers can be used as commanders in Magic: The Gathering if the format allows it, such as in the Commander format.
No, duel deck cards are not legal in the Modern format of Magic: The Gathering.
The Kaladesh set will rotate out of the Standard format in Magic: The Gathering in the fall of 2022.
No, Skullclamp is currently banned in all formats of Magic: The Gathering.
Yes, in the Commander format of Magic: The Gathering, you can use a planeswalker card as your commander.
Yes, a legendary planeswalker can be used as a commander in a game of Magic: The Gathering if the game format allows it.
Some effective blue counterspells commonly used in the Modern format of Magic: The Gathering include Mana Leak, Remand, Cryptic Command, and Force of Negation.
In Magic: The Gathering Commander format, when a card is exiled, it can usually be returned to its owner's hand or graveyard. However, some cards may have specific rules that prevent them from being returned in this way.