Cost
Knock a creature you control Prone: summon this to an inactive monument zone.
Prone: Prone creatures cannot perform actions. They can use an "get up" action to lose their Prone condition.

Once-per-turn Activation
Sac [this], a creature, and an artifact: activate this zone.

Optional Repeatable Trigger
Whenever a Prone creature gets up: its controller gain 1 life.
Prone: Prone creatures cannot perform actions. They can use an "get up" action to lose their Prone condition.