Cheapest priced copy (Lorwyn Eclipsed Commander): $10.99 at Card Kingdom, near mint, their price list as of .
Chimil, the Inner Sun 
Legendary Artifact · Mythic · The Lost Caverns of Ixalan · #249
Spells you control can't be countered.
At the beginning of your end step, discover 5. (Exile cards from the top of your library until you exile a nonland card with mana value 5 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
5 printings · $10.99 to $249.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Lorwyn Eclipsed Commander | 137 | Mythic | $10.99 | — |
| The Lost Caverns of Ixalan Commander | 106 | Mythic | $69.99 | $249.99 |
| The Lost Caverns of Ixalan | 249 | Mythic | $10.99 | $22.99 |
| The Lost Caverns of Ixalan Promos | 249p | Mythic | $11.99 | $27.99 |
| The Lost Caverns of Ixalan Promos | 249s | Mythic | — | $34.99 |
2 rulings from Wizards of the Coast
- 10 November 2023A spell or ability that counters spells can still target spells that can't be countered. When that spell or ability resolves, the uncounterable spell won't be countered, but any additional effects of the countering spell or ability will still happen.
- 10 November 2023Chimil, the Inner Sun's first ability applies only while it's on the battlefield. While it's a spell, it can be countered.