Cheapest priced copy (Dominaria United): $1.29 at Card Kingdom, near mint, their price list as of .
The World Spell 
Enchantment — Saga · Mythic · Dominaria United · #189
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, II — Look at the top seven cards of your library. You may reveal a non-Saga permanent card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
III — Put up to two non-Saga permanent cards from your hand onto the battlefield.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.99 to $6.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria United | 189 | Mythic | $1.29 | $0.99 |
| Dominaria United Promos | 189p | Mythic | $1.49 | $6.99 |
| Dominaria United Promos | 189s | Mythic | — | $2.79 |
One ruling 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.