Cheapest priced copy (Double Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Pentad Prism 
Artifact · Common · Fifth Dawn · #143
Sunburst (This artifact enters with a charge counter on it for each color of mana spent to cast it.)
Remove a charge counter from this artifact: Add one mana of any color.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
5 printings · $0.35 to $15.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 281 | Uncommon | $0.35 | $0.79Out of stock |
| Fifth Dawn | 143 | Common | $0.39 | $15.99 |
| Edge of Eternities Commander | 56 | Uncommon | $0.35 | — |
| Planechase | 122 | Common | $0.59 | — |
| World Championship Decks 2004 | mb143 | Common | $0.35 | — |
2 rulings from Wizards of the Coast
- 7 August 2020Sunburst checks what mana was actually spent to cast the spell. If an effect allows you to spend mana "as though it were mana" of any color or type, that allows you to spend mana you couldn't otherwise spend, but it doesn't change what mana you spent to cast the spell.
- 7 August 2020Once Pentad Prism has run out of charge counters, it remains on the battlefield.