There are plenty of ways to make great use out of a card like Jumbo Cactuar, so long as an opponent doesn't immediately take it out of the game, and even then, it's a great way to reduce the amount of counterpla y at their disposal
After all, you get no built-in protection aside from your ultimate, and instead what you're mainly working with is a bit of card draw and ramp
8.0-8.9: While maybe not a bomb, these cards are still first pickable, either for being an exceptional creature or for being prime removal
1 Kogla, the Titan Ape
Drop it on turn two, and watch the parade of Arrogant Wurms, Roar of the Wurms, Deep Analysis, Basking Rootwallas, Wonders, and other such nonsense begin
Gisela, the Broken Blade Gisela, the Broken Blade is a good, efficient creature with nice stats and abilities, but it isnt the most interesting creature to build around in EDH