Darksteel Colossus
Artifact Creature — Golem{11}11/11
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) 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.
Colour identity Colorless · Indestructible, Trample
In short
Darksteel Colossus has 6 listed printings; the most valuable is the Secret Lair printing from SLD at US$27.59 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.
Every Darksteel Colossus printing
Secret Lair
Darksteel Colossus
SLD · 1081
TCGplayer market
US$27.59
Darksteel Colossus
M10 · 208
TCGplayer market
US$10.36
Secret Lair
Darksteel Colossus
SLD · 57
TCGplayer market
US$5.83
Darksteel Colossus
DST · 109
TCGplayer market
US$5.26
Borderless
Darksteel Colossus
PW24 · 19
Price not tracked
Darksteel Colossus
FDN · 671
TCGplayer market
US$0.84