Yes, Isochron Scepter will imprint an instant card from your hand with the additional requirement that it must have a converted mana cost of two or less; it will then allow you to play that copy whenever you feel like by paying two generic mana and tapping the scepter.
There are a great deal of artifacts that interact with instants and clone them in a variety of different ways with different requirements and limitations.
Examples:
Panoptic Mirror
Isochron Scepter
Knowledge Pool
Mirrari
Yes, artifact lands count as artifacts in Magic: The Gathering.
Yes, artifact creatures are considered artifacts in the game of Magic: The Gathering.
'Flash Counter' is a Blue Instant costing 1U. "Counter target instant spell."
Yes. As long as you qualify as a legal target for the spell, you can choose yourself as the target.
Yes, tap abilities are instant in Magic: The Gathering.
Any card that destroys a target artifact, or destroys all cards on the battlefield.
No, an artifact is not considered a creature type in Magic: The Gathering.
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.
Yes, artifact creatures count as artifacts in Magic: The Gathering.
To put a charge counter on a target artifact in Magic: The Gathering, you can use cards or abilities that specifically allow you to do so. Look for cards with abilities like "put a charge counter on target artifact" or similar effects. These cards will usually have the instructions on how to use them to add charge counters to artifacts.
Yes, in Magic: The Gathering, you can activate creature abilities at instant speed during a game.
Yes, you can tap artifacts at instant speed during your opponent's turn in Magic: The Gathering.