Who Run Barter Town?

Nonland permanents don't untap during their controllers' untap steps. At the beginning of your upkeep, you lose 2 life.

Artifacts, creatures, and lands your opponents control enter tapped.

You don't lose the game for having 0 or less life. As long as you have 0 or less life, all damage is dealt to you as though its source had infect. (Damage is dealt to you in the form of poison counters.)

Tap all creatures target player controls. Those creatures don't untap during that player's next untap step.