Map to Lorthos's Temple

Whenever you complete one of the following objectives, check it off. If all three are checked off, sacrifce 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.