Level 2 Decks, namely "Paleozoic" and later "Spright", often ran "Swap Frog" and "Ronintoadin" (if legal) to summon it
Her activated ability even removes flavor text so then she can be blocked, which is that odd tension I was talking about, but lets be real: thats a fine tradeoff, given thats shes probably stealing some pretty sweet abilities
The fact that it cant be destroyed by battle when it attacks means it's an easy way to get to Divine Arsenal AA-ZEUS, meaning its an easy path to destroying a board
Id pay 3 mana just for an enchantment that did that, so the fact that theres also an indestructible 4/5 body attached to it that can smash face later in the game is just pure upside
It may not look as powerful until you realize you can cheat a Jumbo Cactuar into play and deal thousands of damage to other players, just by tapping your commander