Whenever you complete one of the following objectives, check it off. If all three are checked off, sacrifice Map to Lorthos's Temple. If you do, create a Lorthos, the Tidemaker token.
☐ Diving Gear - An artifact enters the battlefield under your control.
☐ Merfolk - A Merfolk enters the battlefield under your control.
☐ Ritual - You cast an instant or sorcery spell.