Saregil, the Covetous Blade

Equipped creature gets +2/+2.
As long as Saregil, the Covetous Blade is equipped to a creature, if you would gain life,
you gain twice that much life instead.
At the beginning of your upkeep, if Saregil, the Covetous Blade is not equipped to a creature, it's controller loses 10 life.
Equip - pay 3 life