Asharu, Master Craftsman

Artifact spells you cast cost {r} less to cast. This
effect only reduces the amount of colored mana
you pay.
{2}{g}: Put a number of +1/+1 counters on target creature equal to the converted mana cost of
target artifact spell you control.
{1}{u}: Target artifact gains hexproof until the
start of your next turn.
{p/b}{p/b}, Sacrifice four artifacts: Transform Asharu, Master Craftsman