Netherborn Phalanx : Transmute for a 6 mana cost card, or a come into play ability where each opponent loses a life for each creature they control
This card lets you draw off of equipment entering play (whether cast, recurred, or cheated in), and grants equip 0 to all of your equipment for jumping through the kindergarten level hoop jump of achieving metalcraft
Duskmourn: House of Horror A Duskmourn: House of Horror Play Booster Box is like a hall full of doors to open, expect unknowns with all the face-down cards, and some good Limited splashing and mana fixing thanks to the common and rare cycles of dual lands
Modal cards are often interaction, which lend themselves well to a controlling shell, and you can use Riku as a source of card advantage and a threat to close the game out with
Best Play Additional Land Payoffs Many of the cards from this list are also payoffs for playing more lands