Crime Novelist

Whenever you sacrifice an artifact, put a +1/+1 counter on Crime Novelist and add {R}.

Goblin Warchief

Goblin spells you cast cost {1} less to cast.
Goblins you control have haste.

{T}: Add one mana of any color in your commander's color identity.

Haste
Whenever a creature you control with haste attacks, create a tapped Treasure token.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
{T}: Add {B}, {R}, or {G}.

Haste
Goblin spells and Rogue spells you cast cost {1} less to cast.