Kiln of the First Flame

Kiln of the First Flame enters the battlefield with three Cinder counters on it.
{t}, remove a Cinder counter from Kiln of the First Flame: Add {r}{r}
{t}, sacrifice a Legendary creature, add a Cinder counter to Kiln of the First Flame.
When Kiln of the First flame has no Cinder counters, transform it.