Tristan, Purity Unleashed

Cast only if you control Tristan, Voice of
Innocence.
Tristan cannot be enchanted or equipped.
You cannot create Gold or Treasure tokens.
First Strike, Flying, Haste, Lifelink, Trample, Vanishing 5, Vigilance.
When this enters the battlefield, Tristan, Voice
of Innocence phases out until this leaves the battlefield