mtg x ff commander deck Magic: The Gathering Final Fantasy call upon classic summons Magic: The Gathering®—FINAL FANTASY™ Commander

The first section, above the type line, contains their chapter abilities, and the second section, below the type line, contains any other abilities (or italicized flavor text)

All of this is to say that Oko is extremely hard to answer in combat, so it largely requires a spell to deal with it (or, as we see in Throne of Eldraine Standard, you can go way over the top of its threat generation by, for example, making lots of 2/2s with Field of the Dead)

Alexander Gregory Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp

Your strategy here consists of playing as many cards as you can from exile to create a lot of Treasure and generate some strong mana advantage to play even more cards

In white, the most obvious additions are Glorious Anthem