The key part about Celestine is that this ability doesnt cost you any mana to use unlike its life loss counterpart a few ranks back, leaving you free to spend all your mana on other things during your turn
It's just extremely good and efficient at what it does and that's all it needs to be
Based on this experimenation, it seems like the Sapphire/Steel deck is more aggressive , with new cards boosting Strength and increasing Resistance, while the Amber/Amethyst deck is more about mitigating and removing damage
If youre looking to introduce them to the game through this set, this deck would likely compete pretty well with the Tales of Middle-earth Commander precons and would match the theme well
The one thing that Limit Break has going against it is the Equipment itself
4 //// Caetus, Sea Tyrant of Segovia Legendary Creature Serpent 3/3 Noncreature spells you cast have convoke