Jester, Sapphire Trickster

Invoke Duplicity — When Jester enters the battlefield and at the beginning of each upkeep, create a Duplicate token, which is a 1/1 blue Illusion creature with “Whenever you cast an instant or sorcery spell, this creature deals 1 damage to any target and you gain 1 life.” Exile it at the beginning of the next end step.

{w}{u}{r}: Transform Jester. Activate only if you’ve gained five or more life this turn.