Blightsteel Colossus is a massive artifact creature built to end games through poison counters. Its eleven power, trample, and infect mean an unblocked hit can deliver more than the usual ten-poison threshold, while indestructible protects it against destruction and lethal damage. The twelve-mana casting cost makes it a dedicated top-end threat rather than something most decks can deploy casually.
Artifact strategies can use cards such as Kuldotha Forgemaster to put the Colossus directly onto the battlefield. In decks with blue, effects that exchange or deploy artifacts can offer another route, while colorless ramp decks may simply generate enough mana to cast it. Haste and evasion support are valuable because a full turn cycle gives opponents opportunities to find exile, bounce, or sacrifice-based answers.
The graveyard replacement effect changes how you can build around it. If Colossus would enter a graveyard, it is revealed and shuffled into its owner's library instead. Ordinary reanimation spells therefore cannot rely on it waiting in the graveyard, and sacrificing it does not leave a normal target for a later Animate Dead.
Trample helps against blockers, but you still assign damage according to the normal combat rules. Infect changes the results of damage to creatures and players rather than making blocking irrelevant. Include Colossus when the deck can reliably deploy and support an expensive artifact threat, with a plan for connecting rather than merely putting an intimidating creature onto the battlefield.
