This is just the latest Glimmer being revealed ahead of the new Disney Lorcana chapters debut
The old hermit would never say what he fed his mushrooms, and people learned not to ask
You need to protect your cards if you want to keep them long term
This allows for some interesting strategizing: Will you play weaker, less memory-intensive cards on your own turn to choke your opponent on memory during theirs
Warehouse Krark's Thumb Krark, the Thumbless Mana Clash Mana Crypt Mana Screw Mijae Djinn Mirror March Mirrored Depths Mogg Assassin Molten Birth Molten Sentry Mutalith Vortex Beast Negative Zone Portal Odds // Ends Odds // Ends Okaun, Eye of Chaos Orcish Captain Planar Chaos Plasma Caster Pokey, the Scallywagg (playtest) Puppet's Verdict Rakdos, the Showstopper Ral Zarek Ral, Monsoon Mage Risky Move Scoria Wurm Setzer, Wandering Gambler Skittish Valesk Skyclaw Thrash Sorcerer's Strongbox Squee's Revenge Stitch in Time Tavern Scoundrel Tavern Swindler The Gold Saucer Tide of War Unleash the Flux
Massive card advantage is at the top of this enchantment's job description: Underworld Breach turns your graveyard into a (huge) extension of your hand, and basically provides flashback to anything you cast