Desert Desert is, well, the namesake card
You can only activate 1 "Dowsing Fusion" per turn
Aboshan, Cephalid Emperor Acquisition Octopus Backstreet Bruiser Bubble Smuggler Caelorna, Coral Tyrant Callous Oppressor Cephalid Aristocrat Cephalid Broker Cephalid Constable Cephalid Facetaker Cephalid Illusionist Cephalid Inkmage Cephalid Inkshrouder Cephalid Looter Cephalid Pathmage Cephalid Retainer Cephalid Sage Cephalid Scout Cephalid Snitch Cephalid Vandal Crafty Octopus Elder Deep-Fiend Giant Octopus Godhunter Octopus Kamiz, Obscura Oculus Keen Buccaneer Llawan, Cephalid Empress Lorthos, the Tidemaker Lorthos, the Tidemaker Marvo, Deep Operative Mesmerizing Benthid Obscura Interceptor Octavia, Living Thesis Octoprophet Omen Hawker Psychic Pickpocket Purple Pentapus Queza, Augur of Agonies Revel Ruiner Sea-Dasher Octopus Sealock Monster Shark Shredder, Killer Clone Sharktocrab Shield Broker Tidal Terror Ultros, Obnoxious Octopus Unruly Krasis
Takuhee
Phantom Carriage Generally speaking, the good creatures with ETB tutors cost three mana: think Imperial Recruiter, Heliod's Pilgrim, and Spellseeker