Aberrant Researcher Admiral Brass, Unsinkable Advanced Reconstruction Airlift Chaplain Altar of the Wretched Angel of Suffering Another Chance Anowon, the Ruin Thief Argoth, Sanctum of Nature Ark of Hunger Armored Skaab Ashcoat of the Shadow Swarm Ashcoat of the Shadow Swarm Atrocious Experiment Aven Heartstabber Ballad of the Black Flag Bane-Marked Leonin Barrowgoyf Belltower Sphinx Billowing Shriekmass Black Widow, Daring Operative Blight Titan Blood Spatter Analysis Bloodcurdler Bruvac the Grandiloquent Carrion Cruiser Carrion Grub Cauldron's Gift Cemetery Tampering Cephalid Aristocrat Cephalid Illusionist Cephalid Vandal Chains of Mephistopheles Charmed Pendant Cloudhoof Kirin Combustible Gearhulk Convergence of Dominion Coral Colony Corpse Churn Court of Cunning Covetous Castaway Crow of Dark Tidings Daggerfang Duo Dakmor Salvage Darkblast Dawnhand Eulogist Deathcap Marionette Deep Spawn Demogorgon's Clutches Demonic Covenant Deranged Assistant Devoted Grafkeeper Devourer of Memory Dig Up the Body Diviner of Mist Does Machines Doom's Servo-Guards Doombot Harbinger Dread Osseosaur Dread Summons Dreadhound Eden, Seat of the Sanctum Eerie Gravestone Eerie Soultender Emry, Lurker of the Loch Ertai's Familiar Excavated Wall Extract from Darkness Extractor Demon Eyeblight Cullers Fallaji Archaeologist False Memories

There is no mention of a minimum or maximum mana cost for the creature , meaning you could theoretically bring any creature to the battlefield for free
This card should shake up both casual and cEDH tables
It helps that the mana can be any combination of colors, while Savage Ventmaw can only make red and green mana when it attacks
Indestructible (Damage and effects that say "destroy" don't destroy this creature.) If Darksteel Colossus would be put into a graveyard from anywhere, reveal Darksteel Colossus and shuffle it into its owner's library instead