Once something resolves, Blue has limited options
Make it cheaper with Convoke
But in addition to that, you can also cast it for its dash cost, basically ensuring you can trigger any possible ETB effects you have each turn
C13 introduced some mechanics specifically built for Commander, like tracking how many times a single commander card has been cast and interesting ways to move commanders out of the command zone
Park Bleater Park Re-Entry Pin Collection Ride Guide Robo-Piata Sanguine Sipper Solaflora, Intergalactic Icon Starlight Spectacular Surprise Party Sword-Swallowing Seraph T.A.P.P.E.R
Kuja, Genome Sorcerer / Trance Kuja, Fate Defied Strangely enough, I rather think Kuja, Genome Sorcerer is the better half of this double-faced card