For 4 mana, we get a game-ender for 2 mana cheaper than Felidar Sovereign on a white enchantment, so it's harder to remove with just a simple Doom Blade, and doesnt require we spend that 50 life to blast someone like Aetherflux Reservoir
For political leverage, red Auras for MTG like Curse of Opulence are unmatched
Imagine deploying a Gutsy Knight of Catarina, its stoic resilience mirroring the unyielding spirits of Dark Souls warriors
I could see it getting more valuable the further we get from March of the Machine s print run
Some mono-Blue and artifact things will change the power of artifacts you control, like Ensoul Artifact turning it into a 5/5, so that would work
On top of that, he bounces creatures, manipulates your opponents draws, and threatens a game-ending ultimate that exiles their entire library