I think the "both is good" argument for Valki and Tibalt is that they'll be good together but there's no added value
2/1 Illustrated by Serena Malyon
When Gilded Drake enters the battlefield, exchange control of Gilded Drake and up to one target creature an opponent controls
Here's how the deck looks with the upgrades added: Further Upgrades There's a bunch of heavy-hitter Phyrexians you can toss in the top-end: Elesh Norn, Mother of Machines and Mondrak, Glory Dominus both double the amount of tokens you're incubating with Brimaz which is super sweet, Elesh Norn is a great anthem for incubation, plus there's Sheoldred, Sheoldred, Whispering One, Sheoldred, the Apocalypse (lots of Sheoldreds!),Wurmcoil Engine, Skithiryx, the Blight Dragon
Creepy, crawly, multiple appendages
Bahamut is depicted as his Final Fantasy X version