Rinne, Runescape Dreamer

When Rinne, Runescape Dreamer enters the battlefield, you get {e} (one energy counter) for
each color of mana used to cast her.
{e},{t}: Tap target creature.
Whenever you cast an instant or sorcery, untap
Rinne, Runescape Dreamer and you get {e} (one
energy counter)