The 5 Sigils (formally the 5 Seals( or Crests)) are a set of symbols/markings that must be acquired in Dragon Quest II. By collecting all 5, the heroes are able to summon Rubiss at the Rubiss Shrine and receive the Rubiss Charm.
The Sun Sigil can be found by searching a specific tile on the outskirts of the Fire Shrine.
The Soul Sigil (formally Life Seal) is located in a treasure chest on floor B1 inside the Cave to Rhone. In the iOS remake, the King of Tantegel castle has the sigil. It can be claimed after the party gets the Golden Key to unlock the room he is secluded in.
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