Mr. Freeze

"Villain"
Cumulative Upkeep {s}{w}: gain 2 life; otherwise,
Mr. Freeze gets a -1/-1 counter.
Mr. Freeze has Indestructible as long as you
control 3 or more Diamond Artifacts.
{p/u}{p/w}{t}: create a Diamond artifact with: "{t}:
sacrifice: add {1}{s}{w}{u} to your mana pool.
{s}{u/b}{p/u}{p/w}: put a Stun counter on target
permanent. It loses all abilities for as long as it
has a Stun counter on it.