'Artifact' is a card type, not a creature type. You can't pick 'Artifact' for the purposes of Extinction. Most artifact creatures have a creature type too - construct, myr, etc, but if it doesn't, then it is technically immune to Extinction, like Morphs.
An Artifact Creature is simply a creature who is also an artifact. It is subject to all normal rules regarding both creatures and artifacts, and if a spell can be used against a creature or an artifact, it can be used on that creature.
If a creature has Intimidate, when it attacks, it can only be blocked by creatures that share a colour with it, or artifact creatures.
No, an artifact is not considered a creature type in Magic: The Gathering.
In Magic: The Gathering, multiple creatures can block a single creature. There is no limit to the number of creatures that can block a single attacking creature.
No, "artifact" is not considered a creature type in Magic: The Gathering. It is a separate card type that represents non-living objects or magical items in the game.
In a game of Magic: The Gathering, multiple creatures can block a single creature.
Yes, creature tokens are considered creatures in Magic: The Gathering.
No, in Magic: The Gathering, you can only block one creature with one creature.
In Magic: The Gathering, you can block one creature with each of your creatures that are able to block.
Yes, in Magic: The Gathering, you tap your creatures to indicate that they are blocking an attacking creature.
Yes, you can summon an artifact creature and a normal artifact in the same turn, provided you have the necessary mana and card availability. Artifact creatures count as both artifacts and creatures, so they can be played alongside other artifacts. Just ensure you adhere to any specific restrictions or conditions outlined by the cards you are using.
In Magic: The Gathering, creatures mutate by combining with other creatures to create a new, more powerful creature with combined abilities and characteristics. This process involves casting a creature with the mutate ability on top of another creature on the battlefield, resulting in a mutated creature with a mix of both creatures' traits.