Cheapest priced copy (Dominaria United): $0.99 at Card Kingdom, near mint, their price list as of .
Shanna, Purifying Blade 
Legendary Creature — Human Warrior · 3/3 · Mythic · Dominaria United · #218
Lifelink
At the beginning of your end step, you may pay {X}. If you do, draw X cards. X can't be greater than the amount of life you gained this turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.99 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria United | 218 | Mythic | $0.99 | $0.99 |
| Dominaria United | 317 | Mythic | $1.29 | $0.99 |
| Dominaria United | 358 | Mythic | — | $0.99 |
| Dominaria United Promos | 218p | Mythic | $0.99 | $4.49 |
| Dominaria United Promos | 218s | Mythic | — | $1.79 |
One ruling from Wizards of the Coast
- 9 September 2022You choose the value for X as the ability resolves.