The more cards you use from your hand, the less mana you'll have available to play the cards you're trying to eliminate
Paying two mana to upgrade this feels pretty good, especially as the boost in mana production for your treasures essentially pays you back

Adaptive Sporesinger Agent Frank Horrigan Atomize Atraxa, Praetors' Voice Blightbelly Rat Bloated Contaminator Bloom Hulk Brimaz, Blight of Oreskos Brokers Confluence Cacophony Scamp Cankerbloom Carnival Elephant Meteor Carnivorous Canopy Cayth, Famed Mechanist Contagion Clasp Contagion Engine Contagious Vorrac Contaminant Grafter Contentious Plan Copper Longlegs Core Prowler Courage in Crisis Dreamtide Whale Drown in Ichor Everythingamajig Evolution Sage Expand the Sphere Expansion Algorithm Experimental Augury Ezuri, Stalker of Spheres Filigree Vector Flux Channeler Fuel for the Cause Gitaxian Anatomist Glistening Sphere Grateful Apparition Grim Affliction Guildpact Informant Gulping Scraptrap High Perfect Morcant Huatli's Raptor Ichormoon Gauntlet Inexorable Tide Karn's Bastion Kilo, Apogee Mind Kiora's Dambreaker Lulu, Stern Guardian Martyr for the Cause Merfolk Skydiver Mesmerizing Dose Metastatic Evangel Mutational Advantage Norn's Choirmaster Park Heights Maverick Patrolling Peacemaker Phyrexian Seedling (playtest) Plaguemaw Beast Planewide Celebration Pollenbright Druid Proud Pack-Rhino Radstorm Recon Craft Theta Reject Imperfection Ripples of Potential Roalesk, Apex Hybrid Scheming Aspirant Serum Snare Smell Fear Spread the Sickness Staff of Compleation Steady Progress Surge Conductor

In some cases youll flip over two Mountains, meaning that if you play a land first, youll lose access to one of them
Take her on alone or with friends, Illumineer's Quest - Deep Trouble contains two standard decks and one special Ursula deck for use in an Illumineer's Quest game
Bone Miser twists it even further, turning your discarded cards into a pile of resources