Each of these cards can be cast for free so long as you sacrifice a creature that matches the color of the spell, which is a little too easy to do in a format like Historic
For example, if a Lakeside Shack and a Breeding Pool you control are entering at the same time (perhaps because of the effect of a spell like Scapeshift), your life total is 14, and your opponent's life total is 20, the Lakeside Shack will enter tapped whether or not you choose to pay life as Breeding Pool enters
Donald Duck - Pie Slinger's Shift ability is fairly minor by the standard metric, reducing his cost from five ink to four, but the Humble Pie ability docks two lore from each opponent when he's deployed with Shift
Graveyard decks have always been a huge part of Magic , ever since the first Animate Dead was used to cheat out the first Lord of the Pit or Shivan Dragon
Terminus When Terminus came out, you could still tuck someones commander