Shirei, Shizo's Caretaker

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Rulings:

• 12/7/2018 Shirei’s ability only triggers if the creature’s power immediately before leaving the battlefield is 1 or less, regardless of its power in your graveyard.
• 12/7/2018 Shirei’s ability triggers if a creature you own with power 1 or less dies under another player’s control.
• 12/7/2018 If Shirei leaves the battlefield and returns to the battlefield after a creature with power 1 or less is put into your graveyard, Shirei is considered a new object. The delayed triggered ability won’t return the creature to the battlefield.
• 12/7/2018 Shirei’s ability can’t return any creatures that died before Shirei entered the battlefield.