Are we spending our wealth though? Pay to win. We have 3. We could do high-effort, high-cost snek.
The Lightning Bolt of Ages, Valk Madu
Muu has an idea she had to bind one of the sea's mighty legends to her service. Nothing less would do but to tame one of those that lived in the depths. Going around gathering together a list of rumors and myths, she tracked down her prey to a stretch of ocean where beneath the sea laid a giant cave. And from that cave emerged a snake many times long enough to crush any boat to smithereens. It instantly attacked the angel, believing it to be a colossal squid it fed on, but Muu turned the trap, revealing her full power and entering a clash with it. While it was strong, an Angel is not so easily crushed, even if the metaphorical might behind such a creature put it on somewhat even footing. But eventually Muu managed to subdue it, depriving it of oxygen. She then dragged it back the many nautical miles, dodging other sea creatures as she went, though few were dumb enough to attack something that had killed one of the alpha predators' of that region.
Upon beaching it she bound it in magical seals, and began to go to work. Using the purest Tin she could source with her wealth, as well as Silver and Copper, she begin making a skeleton, applying frozen liquid Mercury to the Tin As she molded the metals, forging and cleansing them of impurities, the magical energies infusing metals began to whip up a storm overhead, an expected outcome. Even as the lightning of the heavens began raining down, she continued, before binding the creature she had captured in it!
And so Muu wove her magic, binding it to the sea serpent. As the lightning grew more and more fierce, a giant bolt struck the snake, awakening it and shattering the seals. It once more lashed out, but Muu was ready, triggering the enchantment she had weaved in an instant. The vast vitality of the snake was instantly sucked into the Tin and Mercury, before Muu sent forth a sliver of power to the heavens above, calling down all the gathered lightning on her new Servant. The copper melted into the scales, the Silver drew on moonlight from the suddenly cleared night sky, even as the Tin and Silver melted and hardened in the same instant, contracting around the body to seal it in frozen liquid. even as the magical properties fully fused into the snake, frying it's mind beyond any capacity to resist. It was there, as the snake was caught between death and life that Muu dove in and bound the snake to her Hivemind, bombarding it with Good. And so the snake died, and in it's place was born the Lightning Bolt of Ages, Valk Madu.
Valk Madu is a truly giant example of it's species, glutted on magic inherent to the area it lived in, regularly preying on whales and squid. It has a very primal mind, but there is a deep animal intelligence within it, honed by the centuries it has survived until now.
All of this boils down to an extremely powerful ritual. And the result is rather striking. The snake has been turned into an electrical being, being as much magic as flesh. It's capable of sending lightning bolts flashing out with the whip-quick curves of it's body as afterimages. It can also recover and heal quite easily, perfectly capable of sucking the life out out the foes it kills as fuel and food, and breaking down that it swallows as such to heal. The iron maiden which keeps such energies contained can be damaged to cause it to "bleed", but said armor also protects it from mental attacks and has a passive aura which pushes away negative energy. There is a drawback to how this creation was created. While it can still stay underwater, it can't swim... The metal is far too heavy. Likewise, it isn't as protected as the metal makes it appear, the Mercury/Tin being more supercool liquid than solid metal. It's also weak to hot enough heat as that reduces it's conduction, though is not cold-blooded, given it's blood is lightning. It's a bit lethargic during hot sun-filled days as a result, even with the Mercury/Tin keeping it somewhat cool. Other than that Valk Madu fights like a snake, lunging crushing blows, constriction, and crushing, along with eating prey whole and the occasional expenditure of lightning afterimages or shocks. Do not let your size fool you, it can travel very quickly.
Valk Madu uses 3 Wealth token(s) to procure the metal materials for the ritual/forging. All the Metal!
Edits made to the original. Lightning Snek. Giant Snek. All to Snek.
More seriously, we should be spending, unless someone has a very good idea on what to spend all the wealth on.