Cheapest priced copy (Tarkir: Dragonstorm Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Keiga, the Tide Star 
Legendary Creature — Dragon Spirit · 5/5 · Mythic · Modern Masters · #48
Flying
When Keiga dies, gain control of target creature.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
5 printings · $0.49 to $69.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Champions of Kamigawa | 72 | Rare | $1.79 | $69.99 |
| Commander Legends: Battle for Baldur's Gate | 725 | Rare | $0.59 | — |
| Iconic Masters | 63 | Rare | $0.79 | $10.99 |
| Modern Masters | 48 | Mythic | $1.99 | $16.99 |
| Tarkir: Dragonstorm Commander | 156 | Rare | $0.49 | — |
One ruling from Wizards of the Coast
- 17 November 2017Keiga's effect lasts indefinitely. It doesn't wear off during the cleanup step.