Because of the increased number of Equipment cards in the precon deck, Cloud Ex-SOLDIER synergizes quite well with the rest of the cards, as the whole gameplay will revolve around casting creatures and equipment, and then using them to attack opponents for augmented damage
Every god in Kaldheim is an MDFC, so theyre double-faced cards that you can cast on either side
A three mana do nothing is a bad place to be
The high power also makes it a natural pair with many cards that care about a creatures power, like Gwenna, Eyes of Gaea and Gimli's Reckless Might
With that loop in place, you can replay Strip Mine every turn to gradually dismantle an opponents mana base until casting spells is no longer an option
Assigning reckless to an enemy character card will remove their ability to quest, and forces them to challenge one of your character cards