Here are some less expensive alternatives for key cards in your deck: Creatures Enchantments Artifacts Instant/Sorceries Lands
The deck is a White, Blue, and Green (or, Bant) deck that revolves around creatures that enter with +1/+1 counters, that synergise with Tidus, Yuna's Guardian's abilities
Contract From Below lets the player discard their hand and ante the top card of their library in exchange for drawing seven cards, Darkpact lets the player swap an ante card with the top card of their library, and Demonic Attorney causes each player to ante the top card of their library
this is a powerful partner that has been raised and nurtured by one of the most iconic characters in the franchise
Should it see frequent play, the apocalyptic salad bowl will likely elicit plenty of groans from the table, but dont listen to them