The Weasley Twins

Whenever you cast an instant or sorcery spell, you may pay {u}{r}. If you do, copy that spell. You may choose new targets for the copy.
Whenever another nontoken creature enters the battlefield under your control, you may pay {g}{u}. If you do, put a token that's a copy of that creature onto the battlefield.
George, I think we've outgrown full-time education.