Markos, The Killer of Man

Whenever Markos enters the battlefield, destroy all permanents other than Markos. Then create 43 7/2's demon tokens with Haste, Trample, and Menace. When the demons enter the battlefield your life total becomes 1. Other abilities that would create tokens creatures do not allow them to. On your end step you may sacrifice half of the demon tokens you control and your life total becomes half of your starting life total.
Sacrifice a Demon: Gain 1 Life