The fact that you can copy some massive spells based on the amount of combat damage tokens do to an opponent is huge value

Achilles Davenport Adwal, Breaker of Chains Alela, Cunning Conqueror Alpharael, Dreaming Acolyte Anowon, the Ruin Thief Araumi of the Dead Tide Architects of Will Ashiok's Forerunner Atris, Oracle of Half-Truths Aven Heartstabber Azula, Cunning Usurper Baleful Strix Bane Alley Broker Basim Ibn Ishaq Benthic Djinn Bladestitched Skaab Blizzard Specter Callidus Assassin Captain N'ghathrod Carlo, Suave Schemer Cavern Harpy Cemetery Puca Circu, Dimir Lobotomist Consuming Aberration Contraband Kingpin Cunning Nightbonder Curious Cadaver Cybernetica Datasmith Cyclonus, the Saboteur Darkblade Agent Deadeye Brawler Deadeye Plunderers Deathcult Rogue Deceit Dee Kay, Finder of the Lost Dementia Sliver Devourer of Memory Dimir Cutpurse Dimir Doppelganger Dimir Guildmage Dimir Infiltrator Dimir Spybug Dimir Strandcatcher Dinrova Horror Diregraf Captain Disciple of Deceit Doc Ock, Evil Inventor Doctor Octopus, Master Planner Doomsday Specter Dragonlord Silumgar Dralnu, Lich Lord Dreadwing Scavenger Duskmantle Guildmage Duskmantle Seer Eloise, Nephalia Sleuth Emet-Selch of the Third Seat Emet-Selch, Unsundered Ertai Resurrected Etherium Abomination Etrata, Deadly Fugitive Etrata, the Silencer Evangel of Synthesis Evil Twin Ezio, Blade of Vengeance Faerie Snoop Fallen Shinobi Fathom Feeder Fear of Infinity Foggy Swamp Spirit Keeper Garland, Royal Kidnapper Ghastlord of Fugue Ghost, Spectral Saboteur

Ending your turn before the myriad tokens exile means they'll stick around permanently
This ties in directly with Blue's focus on taking control of enemy units, making it a perfect fit for Oriflamme and the Holy Empire of Sanbreque as a whole
However, the ability only triggers once per turn
If you have your commander out, you can choose both modes, which is a plus