It gets a whole host of trinkets and doodads, and if you have nothing better to do before it pops, you can use it to make Karnstructs, one of the most powerful token creatures
Ritual Monsters always have this wording or similar at the start of their effect: "You can Ritual Summon this card with "Luminous Dragon Ritual"." or "You can Ritual Summon this card with any "Nekroz" Ritual Spell." Older cards stated that they must be Ritual Summoned with that card, but there are cards that allow you to Ritual Summon them with other cards as well
Thought I'd give Sylvans a little something new to work with
Merlin, Shapeshifter, the first of the two main cards in this deck, has an Ink cost of 4, a low Strength of 1 and an excellent Willpower of 5
Unlike the previous Marowak cards, this one sees its Holo version claim victory on a technicality, as there's currently no established market price for the Reverse Holo cards