Judge foils have always been used as an avenue to release highly sought after Commander and eternal staples in alternate art form and Ugin definitely fits the bill for a Judge foil reprint
In order to minimize risk we're animating indestructible lands like Darksteel Citadel, making all our lands indestructible with Terra Eternal, countering spells that would destroy our lands with Equinox (a notable judge nightmare!), or uno reversal our opponents' targeted removal with Teferi's Response
Both Prime Speaker Vannifar and Vannifar, Evolved Enigma are viable, interesting commanders: The former works for a Birthing Pod or pod style deck, while the Murders at Karlov Manor printing is built for cloak, disguise, morph, manifest, and all those mechanics that play with colorless, face-down creatures
Gemcutter Buccaneer comes at a rate that makes it clear that the card was designed specifically only to see Commander play
They put one on the bottom of your library
Elsa Spirit of Winter utilizes the highly effective Shift mechanic, which allows players to pay a discounted cost to place her directly on top of a smaller, pre-existing Elsa card to activate her abilities much earlier in the game
