Are all enchantments auras?

Aura and Enchantment are not synonyms. If you look at any Aura card, such as Rancor, you will see that the type line says "Enchantment - Aura", which means the type is Enchantment, and the subtype is Aura. This means that Auras are always Enchantments, while Enchantments are not always Auras.

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What happens to enchantment when creature dies?

An enchantment goes to the graveyard when the creature it is enchanting leaves play. Equipment stays in play, and can be equipped to a new creature for its equip cost. Note that you can only pay equip costs when you are allowed to cast sorceries. Are lands colorless MTG? Although lands do count as permanents, they don't have a color. A card's color is defined by the symbols in the mana cost, and since lands have no mana cost, they are colorless. Lands can be given a color by other effects, such as Deathlace, but by default, they have no color.

What is flash in Magic The Gathering?

Flash is a keyword ability which allows the card it is printed on to be cast at any time you could cast an Instant. Keeping this in consideration, can a planeswalker block? No it can't. Planeswalkers can be attacked directly just like players, but only creatures can block. A Planeswalker isn't a creature. Only creatures can attack or block.

How many lands should be in a 60 card deck?

24 lands The basic rule of thumb is that you play 17-18 lands in a 40 card deck, and 24 lands in a 60 card deck. If you are playing more than a couple cards with mana costs of five or higher, increase the number of lands.