The Halden Remnant

Whenever The Halden Remnant enters the battlefield, pay X life. (X can't be 0.)
At the beginning of your upkeep, create X 1/1 colorless Remnant creature tokens.
At the beginning of the end step of a turn you control six or more Remnant creature tokens, sacrifice The Halden Remnant.
Whispers of Halden reclaim the dust.