You can build it as a midrange commander, or a cast-from-exile commander, or a storm commander, and every path is excellent
This commanders greatest weakness lies in the costs of its creature type of choice, so make heavy use of changelings and cheaper demons like Kardur, Doomscourge and Rakdos, Lord of Riots
Aim for a good mix of spells you can play in the early game
With high HP and energy efficiency, Blastoise Ex poses more of an early-game threat than other Stage 2 boss monsters
However, I think Chandra puts up more big finishes in more universes, given just how many more decks can make good use of her
I love coming here to see the clean art every month I was wondering tho, the Lugia and Ho-Oh immersives from last pack, does a full art of them each solo in a normal card aspect ratio exist anymore