Grandson- Bored

Vigilance
{t}: Add one mana of any color.
Other legendary creatures you control have vigilance and "{t}: Add one mana of any color."

The Grandson : A book?
Grandpa : That's right. When I was your age, television was called books. And this is a special book. It was the book my father used to read to me when I was sick, and I used to read it to your father. And today I'm gonna read it to you.