She can't be countered, comes back from the command zone for free, and every time a Ninja deals combat damage you reveal the top card of your library and deal that much damage to each opponent
Cube, on the other hand, is a much more casual format
It currently has no special queue in the main menu and is completely hidden
Cloud's allies from Final Fantasy VII, such as Tifa, Martial Artist, Sephiroth, Fallen Hero and Red XIII, Proud Warrior, join him to further this strategy and provide payoffs or enablers for having massive creatures past that 7 power mark
This means you can choose a lot of different win conditions by either focussing on token strategies, Elf synergies, or just generally keep your opponents with no cards in hand