In FINAL FANTASY XVI, instead of calling upon a summon, the characters themselves transform into summons
Thunderous Snapper, on the other hand, might not be as desirable to GU magessure, its a four mana 4/4 that can be a card draw engine, but some GU decks will want to stretch their manabases quite substantially, making this turtle hydra too hard to cast
Stasis is often only included in decks that don't care about the effect or can play around it, which leads to tons of frustration as you watch them get to play the game while you sit there unable to do anything but hope you draw removal for it
These Legendary-matters commanders help us get our starring cast of robots into play, meaning we can confidently build around them even from within the 99
So its not just a visual effect
While this may not be a Tier 1 strategy, Swans of Bryn Argoll have inspired players to craft combo-centric Modern decks leveraging it alongside Seismic Assault