Yggdrasil, The World Tree

{3}: You get {e}{e}. (two energy counters.)
Pay {e}{e}{e}{e}{e}{e}{e}{e}{e}{e}: Tap Yggdrasil.
{ut}: Exile target creature until Yggdrasil leaves the battlefield.
When Yggdrasil, The World Tree leaves the battlefield, create a 3/3 legendary black
dragon token named Nidhogg with indestructible
and deathtouch.