Castel, Seraph of Entropy

Card Effect
When this unit comes into play, gain 150 life. When this card leaves the field, put a  250/200 "Fallen" token into play under your control.

Rulings

 * (under review) When this card leaves the field under the opponents control, the opponent would gain the token, as the effect is triggered by leaving the field, and not by landing in the hand/grave/void/deck.