The Heart of Ravnica

When you equip The Heart of Ravnica, the
equipped creature gets three charge counters.
Equipped creature has, "{t}, Remove a charge
counter: Regenerate this creature. Search your
library for up to 2 basic land cards, or 1 land
card, and put them onto the battlefield tapped."
Sacrifice The Heart of Ravnica when equipped creature has no more charge counters.
Equip legendary creature: {3}
"Suddenly, Rakdos knew how to get to Cenadon."