Thankfully, he can also make a body to equip stuff to (while potentially giving you that card back), and he can destroy a permanent
Lets investigate the decklist
One pick thats a little interesting here is Izoni, Thousand-Eyed
While I had the same reaction when first seeing Jumbo Cactuar's unique ability for the first time, the difference between 40, 10,000, or infinite damage is fairly negligible when they all have the same outcome by the end of a Commander match
The I Got This ability can take care of tons of strong, but physically weak characters, and late in the game, you can have Sisu take out several characters in a single turn
Her grandeur ability also protects you by preventing the opponent from casting spells or attacking