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

The all-time favorite Rare Candy cheat is not working, which is a bit of a letdown
A creature with 3 or more damage marked on it that becomes a copy of Permeating Mass will be destroyed immediately after becoming a copy
The short answer: anyone who wants a photo turned into a real, collectible card
(6/16/2023) Frodo, Adventurous Hobbit's ability looks at how much life you've gained in the turn, even if it wasn't on the battlefield when you gained life
Blind Obedience, Court of Ambition, and Vow of Duty all work here