Aetherflux Reservoir KLD-192/5075 (The List Reprints)

Whenever you cast a spell, you gain 1 life for each spell you've cast this turn. Pay 50 life: This artifact deals 50 damage to any target.

NM - $61.10
LP - $48.90
MP - $36.70
HP - $24.50
DMG - $12.30