The fact that Jadelight Spelunker is a Merfolk can provide additional synergies with that typal strategy
First introduced in Wilds of Eldraine, the Adventure mechanic allows players to cast the Adventure half of a card, then later cast the other half from exile once the Adventure resolves
It can net us many cards and the fact that at II it let us tap up to two target creatures and put a stun counter on them, set up the minimum amount of draw to two cards which is a great starting point
The primary commander for the deck, Sauron, Lord of the Rings, costs a hefty eight mana to cast, but with it comes a mighty cast trigger that can turn the tide of the game at later turns
His foul blood seeps out, infecting the land with his final curse."
cards on your field is equal to or less than the number on your opponent's field, choose one: K type, play up to 1 [Vinsmoke Yonji] with a cost of 4 from your hand or trash