Hopefully one or more of these options gives you a few ideas for your own Jumbo Cactuar deck
This is one classic defender, and it's one of the iconic blockers for multiplayer formats
Tatyova, Benthic Druid Disney got it all wrong, in this original Hans Christian Andersen story, the Little Mermaid didnt want to walk on land, she wanted to play lands, draw cards, and crush her enemies
Hyper Aggro The Nuclear Option Although this deck is a little bit better now than it used to be at dealing with aggro decks, the reality is your best bet at beating it remains to go all the way with hyper aggro
As a one-mana instant that replaces itself when you play it, Brainstorm fits naturally into decks that want to rapidly cycle through cards