How many lands should be in a magic deck?

Traditional knowledge is that lands should make up a touch over 40% of a deck. This means about 17–18 lands for a 40-card deck and about 24–25 lands for a 60-card deck.

How many lands should I play?

That takes 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.

Can 2 creatures Block 1 attacker?

Each creature can only block a single attacker, but the defending player may choose to block an attacking creature with more than one creature. Both players are given a chance to cast instants and activate abilities after blockers have been declared.

Is mutate an ETB?

No, the resolving mutating creature spell doesn’t enter the battlefield. It simply makes the creature that was already on the battlefield change characteristics. If I cast a mutate spell on a tapped creature, is it still tapped? Yes, if that original creature was tapped, the new merged creature is tapped.