Be warned that this spell takes most of your strength just to hold.

Then he realized that this spell might take a few minutes to work.

The spell took a lot out of me, I guess.

She didn't think his legs had moved since the spell took effect; was he frozen to the ground?

I hoped he would return in time to see the spell take effect.

The spell, no matter what it was, would have taken longer than that to set up.

Any spell in that book could take most of the night to learn and cast.

Exactly where the spell had taken her, she could not know.

However, this spell was not a very successful and took only seven months.

And wanted to shout with joy at what he found, for the spell had taken full effect.