Scrapper Savant

{1}: Exile target artifact card from a graveyard.
Create a 1/1 colorless Servo artifact creature
token.
{2}, {t}, Sacrifice four Servos: Create a 6/6
colorless Construct artifact creature token
named Gearhulk. It has vigilance if {w} was spent,
menace if {b} was spent, first strike if {r} was
spent, and trample if {g} was spent to activate
this ability.