Kill the Royal Revenant boss

To complete this square you need to defeat the Royal Revenant boss underground in the Kingsrealm Ruins. Wait until the "ENEMY DEFEATED" or equivalent screen appears to mark the square.

This boss can be killed with Heal incantations (except Urgent Heal), so there is potential synergy with Kill a Liurnia boss incantations only. This square also has synergy with Kill 3 Ruins bosses.

Royal Revenant counts as a Liurnia boss.