Aetherflux Reservoir 
Artefacto
While most power is used for ordinary, everyday tasks, one shouldn't underestimate its potential for the extraordinary.
Artist:
Cliff ChildsShare:
Text:
Whenever you cast a spell, you gain 1 life for each spell you've cast this turn.Pay 50 life: Aetherflux Reservoir deals 50 damage to any target.
Rulings:
- 9/20/2016 The first ability counts the spell that caused it to trigger plus any other spells you cast earlier in the turn.
- 9/20/2016 The first ability counts spells you cast earlier in the turn even if you didn’t control Aetherflux Reservoir as you cast them, and even if those spells were countered.
- 9/20/2016 The number of spells you’ve cast is counted only as Aetherflux Reservoir’s triggered ability resolves. For example, if you cast a spell, then respond to the triggered ability with a second spell, you’ll gain 4 life total.
- 9/20/2016 Aetherflux Reservoir’s first ability doesn’t trigger when you cast Aetherflux Reservoir itself.
Legality:
- standard: Not legal
- future: Not legal
- frontier: Legal
- modern: Legal
- legacy: Legal
- pauper: Not legal
- vintage: Legal
- penny: Legal
- commander: Legal
- 1v1: Legal
- duel: Legal
- brawl: Not legal
- oldschool: Not legal
- historic: Legal
- pioneer: Legal
- gladiator: Legal
- premodern: Not legal
- historicbrawl: Legal
- paupercommander: Not legal
- alchemy: Not legal
- explorer: Legal
- predh: Not legal
- oathbreaker: Legal
Sets:
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Kaladesh #192 (rare)
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Kaladesh Promos #192s (rare)
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Mystery Booster #1539 (rare)
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Kaladesh Remastered #217 (rare)
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The Brothers' War Retro Artifacts #2 (mythic)