Sakazuki has a few useful abilities: firstly, the card allows you to trash one card from your hand during the Main Phase, then draw a new one, once per turn
River Kelpie Primarily a payoff for mechanics like persist or undying, River Kelpie provides card advantage whenever permanents enter the battlefield from the graveyard
Like most Magic: The Gathering cards, the value of Reckless Fireweaver depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Secret Lair Drop)
FIC are Commander cards, which you can get in the Final Fantasy Commander precons or find in Collector boosters (but never in Play boosters)
If you decide to scale it up with all the mono-green enchantresses, this deck moves from holding its own up to oh no this is a problem real quick
Willow Geist A fine one-drop that gets buffed each time a card leaves the graveyard