And thus, it's worthy of my list
Whenever you mutate, you get to play a permanent from your deck
Of course, its not on this list of the best Brothers War cards without a little more text

Scientists Aang's Journey Absorb Vis Ainok Guide Analyze the Pollen Ancient Excavation Archaeomancer's Map Ash Barrens Assassin's Trophy Atalan Jackal Attune with Aether Avengers Disassembled Bant Panorama Battle Plan Beamsaw Prospector Beanstalk Giant Beneath the Sands Bioengineered Future Biomechan Engineer Biotech Specialist Bitterthorn, Nissa's Animus Borderland Explorer Borderland Ranger Borough Backup Boseiju Reaches Skyward Boseiju, Who Endures Bountiful Landscape Braidwood Sextant Brave the Wilds Brokers Hideout Bushwhack Cabaretti Courtyard Campus Guide Canoptek Wraith Caravan Vigil Case of the Shattered Pact Centaur Rootcaster Changeling Wayfinder Civic Wayfinder Cleansing Wildfire Colossal Collision Coming Attraction Compass Gnome Contaminated Landscape Cycle of Renewal Dance of the Tumbleweeds Dauntless Scrapbot Dawntreader Elk Deathsprout Deceptive Landscape Deep Reconnaissance Demolition Field Dig Up Diligent Farmhand Dire-Strain Rampage Dismissive Denial District Guide Divert Disaster Double Play Dreamscape Artist Druid of the Emerald Grove Dune Mover Earthbender Ascension Ecologist's Terrarium Edge Rover Edge of Autumn Elanor Gardner Elfhame Sanctuary Embermouth Sentinel Embodiment of Spring Emergency Eject

(They're artifacts with ", , Sacrifice this token: You gain 3 life.") At the beginning of your end step, you may pay and sacrifice a token
[C][C][C] Slap Down: 110 damage