Cheapest priced copy (Dominaria United): $0.49 at Card Kingdom, near mint, their price list as of .
The Elder Dragon War 
Enchantment — Saga · Rare · Dominaria United · #121
Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)
I — This Saga deals 2 damage to each creature and each opponent.
II — Discard any number of cards, then draw that many cards.
III — Create a 4/4 red Dragon creature token with flying.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria United | 121 | Rare | $0.49 | $0.79 |
| Foundations Commander | 156 | Rare | $0.49 | — |
| Dominaria United Promos | 121p | Rare | $0.49 | $0.79 |
| Dominaria United Promos | 121s | Rare | — | $2.49 |
2 rulings from Wizards of the Coast
- 9 September 2022As a Saga with read ahead enters the battlefield, its controller chooses a number from one to that Saga's greatest chapter number. The Saga enters the battlefield with the chosen number of lore counters. Neither choosing the number nor putting the counters on the Saga use the stack, and neither can be responded to.
- 9 September 2022In a Two-Headed Giant game, the first chapter ability deals to damage to each player on the opposing team, reducing that team's life total by 4.