Tinybones, Trinket Thief (SLD foil $35, 4k as commander, 19k as card) Isshin, Two Heavens as One (FCA foil $55, 25k decks as commander, 69k as card) The Deck of Many Things (Ampersand foil $25, 28k decks) Caged Sun (Surge foil $8, Retro foil $5, 137k decks) Nuka-Cola Vending Machine (Borderless foil $40, Surge foil $80, 89k decks) The big draws here are Tinybones and the Nuka-Cola Machine
Players that stall behind on adding cards to their Inkwell won't be able to do much when their opponent starts playing cards that cost eight or nine Ink and have powerful stats and abilities
I think this is going to be a great fit for him, and I wish all the best for him
White likes to set up structures to benefit itself
This is a little too restrictive for some decks, but it really pulls its weight where it can
I have a pretty current list for a Thallids build which is essentially an extreme end of this archetype