Surprisingly, Invasion of Shandalardoesn't have any restrictions on the permanents you can Regrowth, which means in a graveyard deck, you can set up some absurd value loops by using the battle to return two permanents and another copy of itself to your hand and then doing that again the next turn, but this is pretty slow
MTG Defender Examples For example, lets say I control the defender creature [c]Wall of Runes[/c]
The Ursula Scenario Deck has a unique card back to differentiate it from standard cards
If you run blue, Skystrike Officer give your vigilant soldiers a payoff as a rare card draw option
Imagine playing this card in a mono-green or Commander deck
Key factors that determine value beyond rarity include: The Reserved List: A promise from WotC not to reprint certain old cards, creating a finite supply