If you are lucky enough to start out in a casual group that had a whole range of control, midrange, aggro, and combo decks to learn from, then that's a great start
It also could be used to protect something from burn
The Desist side is more situational, but there are definitely going to be board states in this format where it really impacts the board, and most of the time when you get to 6 mana it has a pretty good chance at destroying something, justhopefully not your stuff
This card is quite rare, as its only been reprinted twice since its debut over 10 years ago, so if you have a few of these lying around, toss it in a Commander deck and run wild as you fight your way to the top
That one relies on equipment, and your white cards that dont use that should be in a life gain deck