The Scholar of Seas [Unknown Event]

Other Merfolk you control get +1/+1.
When The Scholar of Seas enters the battlefield, choose one of the following cards at random and create a token that's a copy of it:
• Judge of Currents
• Merrow Reejerey
• Lord of Atlantis
• Merfolk Sovereign
• Sygg, River Guide
• Kumena, Tyrant of Orazca