You just need 3xKC, 2xProcession, 2xGraverobber, and 6xInventor. Some of those could be in your deck to start since you will draw. It is very similar to a recently posted modification of feast that could trash a different action from play.
play:
King's Court 0:
King's Court 1:
Procession 1-> 3xInventor (+6 cards, +6 Actions, +$6, gain 3 $5 cards, Trash 3 Inventor)
Graverobber 1-> Gain 3xInventor on top of deck, also topdeck KC1, Proc1, and GR1 from play.
King's Court 2:
Procession 2-> 3xInventor (as above, plus draws the cards we topdecked)
Graverobber 2-> Gain 3xInventor on top of deck, also topdeck KC2, Proc2, and GR2
Add +buy token somewhere for infinite buys and buy out the whole supply.