Marath, Will of the Wild Marath is both the outlet and a combo piece, which should make things easy
Quintorius Kand, for example, can score free discover 4s, Tezzeret the Seeker can be used to tutor for various artifacts, and The Eternal Wanderer can wipe the board and rebuild it at the same time
Trigger of Yosei, the Morning Star creates the similar effect: the target player skips their untap step
Advanced Search Sets Random Syntax Baleful Eidolon Boon Satyr Cavern Lampad Celestial Archon Chromanticore Crystalline Nautilus Detective's Phoenix Eidolon of Countless Battles Erebos's Emissary Everflame Eidolon Flitterstep Eidolon Ghostblade Eidolon Glyph Elemental Gnarled Scarhide Heliod's Emissary Herald of Torment Hopeful Eidolon Hypnotic Siren Indebted Spirit Kestia, the Cultivator Leafcrown Dryad Mogis's Warhound Nighthowler Nimbus Naiad Noble Quarry Nylea's Emissary Nyxborn Eidolon Nyxborn Hydra Nyxborn Rollicker Nyxborn Shieldmate Nyxborn Triton Nyxborn Unicorn Nyxborn Wolf Observant Alseid Purphoros's Emissary Sightless Brawler Spearpoint Oread Spirespine Spiteful Returned Springheart Nantuko Thassa's Emissary Trickster's Elk Triton Wavebreaker
You can also set a floor price for your collection to avoid selling cards for a price you deem unfair
Panoramas can enter the battlefield untapped, so you can use them for colorless mana right away if you need it
