Their whole deal is that they have a special elixir which, when imbibed, will let a Time Lord regenerate into whoever they want to be (in the Doctor's case into John Hurt, aka The War Doctor)
With only around 30 copies in existence, the card is a modern ultra-rarity
Ursula Deceiver of All playing a Song twice if she Sings it can be brutal for opponents, especially with Ursula Deceiver of All discarding two cards out of the opponents hand
I have an Avacyn, Angel of Hope that smelled like weed for the longest time because the guy I traded it from had it next to his marijuana.The card itself was fine and luckily the smell went away with time
Unless a card is clearly underpriced and about to sell, there's no urgency
Glaceon V Extended Art (Raycardza)