With great psychic-type Pokemon like Mewtwo ex and Alakazam, Gardevoir was a must-have and is the sole reason behind the psychic-type popularity
You can cast it on turn five with no acceleration, and then swing for 10/10 the next turn after activating with mana-making effects you often find in these decks like Chromatic Lantern, Command Tower, and City of Brass
More importantly, I should be able to make much better use of those tokens using the various sacrifice outlets in the deck
As mentioned in a quote under this page's Knight in Sour Armor example, the updated script of The War of the Lions contains a shout out to A Game of Thrones
Important Note: Even though it is a copy, there needs to be a distinct difference that marks the card as a proxy to avoid copyright infringement
The deck can run other combos involving cards like Teshar, Ancestor's Apostle, Myr Retriever, Karmic Guide, and Reveillark, which makes it a versatile Orzhov commander for annoying your opponents and winning games