Battle Box themed around graveyard synergies (Mainly Flashback, Delirium, & Threshold)
Players have a shared library, separate graveyards & exile zones. Any shuffle effects are replaced with "put on the bottom of the library in a random order." If an effect causes both players to draw cards simultaneously, the non-active player will draw first.
Starting hand of 4, no mulligans, one land drop per turn. Lands from exile can be played (players have one of each basic and either the allied or enemy surveil lands chosen at random).
Card restrictions: no creature tokens, searching the library, double-faced cards, or legendary creatures.