The major caveat here is that the Energy ramp from Moltres is facilitated by coin flips a la "Misty", meaning that it's possible to get screwed by RNG and not have enough Fire Energy to attack 3 times in a row even if you play the rest of your game optimally
The line about casting The Indomitable from your graveyard is mostly flavor text, and this card isnt so powerful that youll suddenly see a massive surge in aggressive blue decks in Cube, but it does move the needle, and I would expect to see it in any Cube supporting Pirates as a creature type as well
Fast-mana strategies might only care about tapping it once, though it is also possible to create loops that repeatedly untap it, or sacrifice it and return it to the battlefield, to generate infinite mana
Its not as good (or as deep) as the real card game, but this quickfire version is much better suited to playing on a phone
Character name & Version - This version of Else is called the Snow Queen
[cards] Painter's Servant Grindstone [/cards] Lastly, the main win condition comes from the [card]Painter's Servant[/card] and [card]Grindstone[/card] combo