Light, driven killer

Deathtouch
When Light enters the battlefield create a legendary artifact token called "Death note" with {t} destroy target permanent.
At the beginning of your end step put a time counter on Light, after he puts on the 37th you lose the game.
{2}{p/b} destroy target permanent
Whenever a creature dies gain 1 life
"I'm Ridding The World Of Evil And Creating A Utopia" - Yagami Light