Cheapest priced copy (The Lost Caverns of Ixalan Commander): $0.79 at Card Kingdom, near mint, their price list as of .
Fiery Confluence 
Sorcery · Rare · March of the Machine Commander · #278
Choose three. You may choose the same mode more than once.
• Fiery Confluence deals 1 damage to each creature.
• Fiery Confluence deals 2 damage to each opponent.
• Destroy target artifact.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
10 printings · $0.79 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2015 | 26 | Rare | $0.99 | — |
| Commander Anthology Volume II | 98 | Rare | $0.99 | — |
| Commander Masters | 222 | Rare | $0.99 | $2.99 |
| Commander Masters | 536 | Rare | — | — |
| The Lost Caverns of Ixalan Commander | 226 | Rare | $0.79 | — |
| March of the Machine Commander | 278 | Rare | $0.79 | — |
| Starter Commander Decks | 141 | Rare | $0.99 | — |
| Secret Lair Countdown | 76 | Rare | — | — |
| Signature Spellbook: Chandra | 3 | Rare | $0.99 | $3.49Out of stock |
| Avatar: The Last Airbender Eternal | 165 | Rare | $1.29 | $0.99 |
7 rulings from Wizards of the Coast
- 4 November 2015No player can cast spells or activate abilities in between the modes of a resolving spell.
- 4 November 2015You choose the modes as you cast the spell. Once modes are chosen, they can't be changed.
- 4 November 2015If a mode requires a target, you can select that mode only if there's a legal target available. Ignore the targeting requirements for modes you don't choose. Each time you select that mode, you can choose a different target, or you can choose the same target.
- 4 November 2015If a Confluence is copied, the effect that creates the copy will usually allow you to choose new targets, but you can't choose new modes.
- 4 November 2015No matter which combination of modes you choose, you always follow the instructions of a Confluence in the order they are written. If the same mode is chosen more than once, you choose their relative order as you cast the spell.
- 4 November 2015If all targets for the chosen modes become illegal before the Confluence resolves, the spell won't resolve and none of its effects will happen. If at least one target is still legal, the spell will resolve but will have no effect on any illegal targets.
- 4 November 2015If the first or second modes are chosen multiple times, each of those modes represents a separate damage-dealing event. For example, if your opponent casts Fiery Confluence choosing the second mode three times, and you control Guardian Seraph (a creature with the ability "If a source an opponent controls would deal damage to you, prevent 1 of that damage"), you'll be dealt a total of 3 damage.