Aryth's Fortress

{t}: Add {r}{r} and put {e} on Aryth's Fortress.
{e}{e}{e}: Create a 2/2 red Dragon creature token with flying and haste.
Whenever you or a planeswalker you control takes damage, put that many energy counters on Aryth's Fortress.
Aryth's Fortress enters the battlefield tapped.