Summary Rare promo cards in MTG can have significant value, such as Swords To Plowshares and Mutavault
So far I have only successfully used this trick once, taking a friend's turn and then sacrificing all of his lands by using Trenching Steed
The exiled card of Expressive Iteration may often be a non-optimal play and requires either a very low curve to fully capitalize on it exactly like Grixis Shadow or UR Murktide, or an ongoing finding of additional land drops
I also did not like losing my PlusPowers
Put into actual numbers, each Bill you activate costs you 2-3 turns in the drawn-out games Base-Fossil produces: the 2 cards drawn from Bill, and the Bill card itself leaving your hand, which you could have shuffled back into the deck with Lass or Gambler for an extra turn of draw to help you take your last remaining Prizes or deck your opponent
Probably not, though there's no guarantee of that, admittedly