Shadowsteel Cutthroat

First Strike, Steelborn (As long as this creature is equipped it gets +1/+1)
At the beginning of your postcombat main phase, if a creature dealt combat damage by Shadowsteel Cutthroat died this turn, add {c} to your mana pool equal to its converted mana cost. This mana can only be spent on equipment spells or to pay equip costs.
The shadows are warmer than they are...