When a Darkness Pokmon (yours or your opponent's) that has any Darkness Energy attached to it is Knocked Out by damage from an opponent's attack, that player takes 1 fewer Prize card
Prize promo cards, especially those with a unique name printed on them, are extremely hard to come by
You have to pay three mana AND successfully attack
The strength of The Reaver Cleaver comes from its ability to create Treasure tokens equal to the combat damage the equipped creature dealt
This means you are going to be casting a ton of cheap spells to trigger various effects
Surveil lands Mana with an upside Meticulous Archive, Undercity Sewers, Raucous Theater, Commercial District, Lush Portico, Shadowy Backstreet, Thundering Falls, Underground Mortuary, Elegant Parlor and Hedge Maze are a new cycle of lands that should do a lot of work in every format