Yes, obvious at six mana youre not trying to stop your opponent from casting spells by destroying their Mountain, but, especially because its an instant, you can probably find a window to use it to kill Azcanta, the Sunken Ruin and avoid losing a game
Youve also got other named dragons, such as Icingdeath, Frost Tyrant
Most often, this is in the form of a "results table" in the card text
Or it's bigger brother Omniscience
The card values often come from their rarity, but also from the visual appeal of the card's artwork and even the game mechanics it provides if brought to the table
With high-quality Japanese cards and an exclusive design, this set is very popular among collectors