The Knight, Discarded Vessel

Deathtouch
Whenever another creature enters the battlefield
under your control, you gain 1 life.
Whenever another creature you control dies,
each opponent loses 1 life.
What compels its climb out of the darkness? What
compels its return to this sacred kingdom? A call from
beyond the Seals? By the Vessel, or by that captive
light?
—The Dreamers