by sanjaya666 on Feb 16, 2018
Leyline of Solemnity
If Leyline of Solemnity is in your opening hand, you may begin the game with it on the battlefield.
At the beginning of each player's upkeep, tap all but one creatures he or she controls. That creature gets +X/+X until end of turn, where X is equal to the number of tapped creatures he or she controls.