Scalene Hydra

Modular, Sunburst (This creature enters the
battlefield with a +1/+1 counter on it for each color of
mana spent to cast it. When it dies, you may put its
+1/+1 counters on target artifact creature.)
You may spend colorless mana as though it was
mana of any color to cast artifact spells.
{1}, {t}: Put a +1/+1 counter on Scalene Hydra.