It could also be something I would consider a big bad legend
Cost reduction will allow you to get cards like Karametra, God of Harvests, Reki, the History of Kamigawa, and Gandalf the White out early in order to capitalize on their ramp, draw, and synergy
Final Fantasy summons were clearly made to work with Yuna, Grand Summoner, and you can see the difference spelled out: Yuna places +1/+1 counters on creatures as they enter, but when they die she just cares about any type of counters
However, a lot of decks have the ability to easily deal combat damage with legendary creatures, turning Blitzball into a colorless Divination that any deck can run
Sapphire ensures youre never short on ink, powering up your bigger plays, while Steel provides tough characters and combat tricks to protect your side of the board