So long as you can efficiently draw into new cards to replace the ones you pitch, theres no built-in limitation on how far your train of action can carry you
Parker Luck is Keen Duelist, except you can pick two opponents to ensure they both lose life, if you get to the end game with life totals already low
But, this card keeps the granted ability in addition to those from the card being copied
The Boar should certainly be in the list and should be above Ram-Gang, although not by a lot, that is jsut an oversight I cannot be bothered to fix now
Memorial Vault Heres another one that doesnt excite me personally, but Im not going to pretend like Memorial Vault doesnt represent some crazy card advantage
When this land enters, sacrifice it unless you return an untapped Plains you control to its owners hand