The List

Pentavus

Pentavus enters with five +1/+1 counters on it.
{1}, Remove a +1/+1 counter from Pentavus: Create a 1/1 colorless Pentavite artifact creature token with flying.
{1}, Sacrifice a Pentavite: Put a +1/+1 counter on Pentavus.

Commander Anthology Volume II

Pentavus enters the battlefield with five +1/+1 counters on it.
{1}, Remove a +1/+1 counter from Pentavus: Create a 1/1 colorless Pentavite artifact creature token with flying.
{1}, Sacrifice a Pentavite: Put a +1/+1 counter on Pentavus.

Commander 2014

Pentavus enters the battlefield with five +1/+1 counters on it.
{1}, Remove a +1/+1 counter from Pentavus: Put a 1/1 colorless Pentavite artifact creature token with flying onto the battlefield.
{1}, Sacrifice a Pentavite: Put a +1/+1 counter on Pentavus.

Magic 2012

Duel Decks: Elspeth vs. Tezzeret

Planechase

Mirrodin

Pentavus comes into play with five +1/+1 counters on it.
{1}, Remove a +1/+1 counter from Pentavus: Put a 1/1 Pentavite artifact creature token with flying into play.
{1}, Sacrifice a Pentavite: Put a +1/+1 counter on Pentavus.