Blightsteel Colossus [The List] Dauthi Rogue you may reveal it and

you may reveal it and put it into your hand

each non-Equipment artifact and non-Aura enchantment you control with mana value 4 or greater is a 4/4 Elemental creature in addition to its other types and has indestructible

+ {1} — Choose a creature you control

Set: Unknown Event Type: Instant Rarity: Common Transform all artifacts and Phyrexian creatures on their front face

At the beginning of the end step

Blightsteel Colossus [The List] Dauthi Rogue you may reveal it andSet: The List Type: Artifact Creature Golem Rarity: Mythic Cost: {12} Trample, infect, indestructible If Blightsteel Colossus would be put into a graveyard from anywhere, reveal Blightsteel Colossus and shuffle it into its owner's library instead.