Keeping Gandalf, you could load up on Blue staples and end up with a much better list
There was something R&D was interested in experimenting with, maybe the third Un- set could be that project
Condition of this card heavily plays into the value, as finding a near mint one is extremely difficult
The "short" list looks something like this: Monsters Sphinxs Revelation Control Black Devotion Blue Devotion (now splashing white about half the time) R/W Burn Blitz Naya Hexproof White Aggro-Midrange "Dredge" With those in mind, lets look at the list of the cornerstone cards of those archetypes that can be Decayed Abruptly: Domri Rade
This happens often in Magic, especially for Commander staples and popular competitive cards
Then, when you're ready, you can transform him into The Invincible Iron Man for six mana (1U, 1R, 4C) who is a 5/5 Flying creature with Haste, who, at the beginning of combat on your turn, lets you put an artifact card from your hand onto the battlefield, and if it's an equipment, you may attach it to Iron Man for free