Chrollo Lucilfer, kleptomaniac

Chrollos power and toughness are
the number of artifacts that you control.
When Chrollo enters the battlefield under your control, create an artifact token called bandits secret, Target player reveals his or her hand. Exile target artifact, sorcery or instant and imprint it on bandit’s secret.
{4}{u}{b}: exile Chrollo, then return him to the battlefield.