Simple infinite combo... probably there is something better.
Ferry on King's Court, +1 card token on New Feast
King's Court 0-> (this one stays in play)
King's Court 1->
Graverobber 1
New Feast 1 (trashing KC1, GR1, NF1)
King's Court 2 ->
Graverobber 2 (gaining KC1, GR1, NF1)
New Feast 2 (trashing KC2, GR2, NF2/drawing KC1, GR1, NF1)
<Loop Forever>
Add more tokens or something to actually get something out of it.
Edit: With a standard Kingdom containing Ferry/Pathfinding + Teacher, you can get +1 card and +1 coin on New Feast, and +1 buy on Graverobber for infinite coins and buys.
Also I forgot you are gaining infinite cards costing up to $5 with New Feast.