Scholar of the Lost Trove can work well too, in the right build
However, the Darksteel version doesnt show an otter transmuting a fish skeleton into a magic sword like this one does
Your plays no longer need to be infinitely profitable or even resource-positive at all
Witherbloom Pestilence Upgrades An aristocrats staple, Pitiless Plunderer is a great payoff for sacrificing or killing off your creatures as you get mana back in treasure form to help keep the party going
For the cost of each color mana, you can give your creatures a ton of useful keywords haste, trample, and lifelink and an additional combat phase
This one, which was available for the duration of the event, is wearing a red cone-shaped party hat