To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of The Water Crystal's first ability)
Its very much a control deck looking to answer opposing threats while bleeding away at opponents with the commander, Y'shtola, Night's Blessed

Commander Legends: Battle for Baldur's Gate Collector Boosters contain a total of six rares and mythic rares: 1 Foil-etched rare or mythic rare legendary creature or Background 1 Traditional foil Booster Fun or extended-art rare or mythic rare 1 Non-foil rulebook or borderless rare or mythic rare 1 Non-foil extended-art rare or mythic rare from the Commander Legends: Battle for Baldur's Gate set 1 Non-foil extended-art rare or mythic rare from Commander Legends: Battle for Baldur's Gate Commander set 1 Traditional foil rare or mythic rare 1 Foil-etched common or uncommon legendary creature or Background 1 Traditional foil common or uncommon legendary creature or Background 1 Traditional foil rulebook common or uncommon 1 Traditional foil basic land 2 Traditional foil uncommons 3 Traditional foil commons 1 Traditional foil double-sided token Commander Decks No Commander deck

Players will need to spend the in-game resource of ink to play cards, but unlike Magic: The Gatherings mana and energy in the Pokmon TCG, players will not need to worry about needing to use specific types of ink in Lorcana
It slows down creature onslaughts and buys you time to set up