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'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.
'This spell costs {X} less to cast, where X is the total mana value of noncreature artifacts you control. Sacrifice two artifacts: Return this card from your graveyard to your...
'Trample Cultivator Colossus's power and toughness are each equal to the number of lands you control. When this creature enters, you may put a land card from your hand onto...
Warp {3} (You may cast this card from your hand for its warp cost. Exile this creature at the beginning of the next end step, then you may cast it...
'During your turn, Colossus has indestructible. (Damage and effects that say "destroy" don't destroy him.)
Other Mutants you control get +1/+1.
'Trample Cultivator Colossus's power and toughness are each equal to the number of lands you control. When this creature enters, you may put a land card from your hand onto...
'Equipped creature gets +10/+10 and loses flying.
Equip {8} ({8}: Attach to target creature you control. Equip only as a sorcery.)
'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...
'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.
'Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) This creature enters with...
'Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
When this creature attacks, sacrifice it at end of combat.
'Collision deals 6 damage to target creature with flying.