Haven of the Spirit Dragon

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a Dragon creature spell.
{2}, {T}, Sacrifice Haven of the Spirit Dragon: Return target Dragon creature card or Ugin planeswalker card from your graveyard to your hand.

Starter Commander Decks

Forgotten Realms Commander

Commander 2017

{T}: Add {C} to your mana pool.
{T}: Add one mana of any color to your mana pool. Spend this mana only to cast a Dragon creature spell.
{2}, {T}, Sacrifice Haven of the Spirit Dragon: Return target Dragon creature card or Ugin planeswalker card from your graveyard to your hand.

Dragons of Tarkir

{T}: Add {1} to your mana pool.
{T}: Add one mana of any color to your mana pool. Spend this mana only to cast a Dragon creature spell.
{2}, {T}, Sacrifice Haven of the Spirit Dragon: Return target Dragon creature card or Ugin planeswalker card from your graveyard to your hand.

The mana produced by Haven of the Spirit Dragon's second ability can be used to pay for any additional or alternative costs (such as dash costs) involved in casting a Dragon creature spell.