At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle.
{T}: Add {C}. {1}: Mishra's Factory becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land. {T}: Target Assembly-Worker creature gets +1/+1 until end of turn.
Each player chooses a number of lands they control equal to the number of lands controlled by the player who controls the fewest, then sacrifices the rest. Players discard cards and sacrifice creatures the same way.