English boxes matter for a different reason
I've cast this spell for its alternate cost many times in Commander, and I don't remember any time where my opponents saw it coming
Alisaie Leveilleur Alphinaud Leveilleur Amy Pond Bebop, Skull & Crossbones Blaring Captain Blaring Recruiter Blue, Loyal Raptor Brallin, Skyshark Rider Cazur, Ruthless Stalker Chakram Retriever Chakram Slinger Evie Frye Frodo, Adventurous Hobbit Gorm the Great Haldan, Avid Arcanist Impetuous Protege Jacob Frye Jenny Flint Kamber, the Plunderer Khorvath Brightflame Krav, the Unredeemed Laurine, the Diversion Ley Weaver Lore Weaver Madame Vastra Merry, Warden of Isengard Mothers Yamazaki (playtest) Nikara, Lair Scavenger Okaun, Eye of Chaos Owen Grady, Raptor Trainer Pako, Arcane Retriever Pippin, Warden of Isengard Pir, Imaginative Rascal Proud Mentor Regna, the Redeemer Rhoda, Geist Avenger Rocksteady, Mutant Marauder Rory Williams Rowan Kenrith Sam, Loyal Attendant Shabraz, the Skyshark Silvar, Devourer of the Free Soulblade Corrupter Soulblade Renewer Sylvia Brightspear Timin, Youthful Geist Toothy, Imaginary Friend Trynn, Champion of Freedom Ukkima, Stalking Shadow Virtus the Veiled Will Kenrith Yannik, Scavenging Sentinel Zndrsplt, Eye of Wisdom
In the case of Jaces Sanctum, it also gives us a static mana cost reduction for our instants and sorceries
I would switch this card out for something better, and maybe something that didn't cost five mana
