The power of witchcraft is very real. It depends on what spell you are casting and how much experience you have in the field. All spells come with a little risk which is why you should consult someone that you trust who is knowledgeable and experienced in the field. If you are looking to cast one spell by yourself because you have a goal in mind the best thing to do is go to a High Priest or Priestess who can assist you.
No, copying a spell is not considered casting it.
No, copying a spell does not count as casting it.
Transfiguration is spell casting.
Yes, replicating a spell counts as casting it.
No, cycling does not count as casting a spell in the game.
No, mutating a creature does not count as casting a creature spell.
No, copying a spell is not considered casting it in Magic: The Gathering.
Mana empties from your pool immediately after you finish casting a spell.
No, copying a spell in Magic: The Gathering does not count as casting it.
No, playing a land is not considered casting a spell in the game of Magic: The Gathering.
No, casting a creature spell does not allow you to draw a card.
'Casting a creature spell' means to pay the mana cost and put the creature spell on the stack. If this is allowed to resolve, then the creature enters the Battlefield.