Mournful Geist

Flying, lifelink
Whenever a non-Spirit creature you control dies,
add {c}. This mana doesn't empty as steps,
phases, and turns end. This ability triggers only
once each turn.
Channel - Discard Mournful Geist: The next
time a non-Spirit creature you control dies this
turn, add {c}. This mana doesn't empty as steps, phases, and turns end.