Cheapest priced copy (Theros Beyond Death): $34.99 at Card Kingdom, near mint, their price list as of .
Nyxbloom Ancient 
Enchantment Creature — Elemental · 5/5 · Mythic · Theros Beyond Death · #190
Trample
If you tap a permanent for mana, it produces three times as much of that mana instead.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
6 printings · $34.99 to $179.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Final Fantasy: Through the Ages (The Cloudsea Djinn) | 16 | Mythic | $39.99 | $179.99 |
| Theros Beyond Death Promos | 190p | Mythic | $39.99 | $54.99 |
| Theros Beyond Death Promos | 190s | Mythic | — | $49.99 |
| Secret Lair Drop | 1275 | Mythic | — | $54.99 |
| Theros Beyond Death | 190 | Mythic | $34.99 | $39.99 |
| Theros Beyond Death | 330 | Mythic | $42.99 | $94.99 |
4 rulings from Wizards of the Coast
- 24 January 2020If an ability triggers “whenever you tap” something for mana and produces mana, that triggered mana ability won’t be affected by Nyxbloom Ancient.
- 24 January 2020Nyxbloom Ancient doesn’t produce any mana itself. Rather, it causes permanents you tap for mana to produce more mana. If the mana ability of that permanent puts any restrictions or riders on the mana it produces, that will apply to all the mana it produces this way.
- 24 January 2020You’re “tapping a permanent for mana” only if you’re activating a mana ability of that permanent that includes the {T} symbol in its cost. A mana ability produces mana as part of its effect.
- 24 January 2020The effects of multiple Nyxbloom Ancients are cumulative. For example, if you have two Nyxbloom Ancients on the battlefield, you’ll get nine times the original amount and type of mana.