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 - $56.90
LP - $45.50
MP - $34.10
HP - $22.80
DMG - $11.40