While Chatterstorm can be used as a value card generating 3-6 tokens, I would rather have a card with a higher floor
Translated to MTG, and it can be relatively chumped somewhat safely, but it will never die in battle that way, at least not on its owner's turn
You can also take a look at the most expensive MTG cards right here, or save some money yourself with these MTG Arena codes.
Still, if you enjoy Final Fantasy, make sure to mark your calendars for the Holiday release to obtain your new toys as soon as possible
Start from the 100-card total, subtract your single commander, then fill the 99 using the ratio above: lands first (36-38), then the ramp, draw, and removal cores (roughly 10/9/9), then 7-10 win conditions, and the rest as synergy and flex slots
Let me know in the comments and watch at The Daily Upkeep where our videos cover both singles and strategy