Cheapest priced copy (Foundations Jumpstart): $0.35 at Card Kingdom, near mint, their price list as of .
Sunblade Samurai 
Enchantment Creature — Human Samurai · 4/4 · Common · Foundations Jumpstart · #264
Vigilance (Attacking doesn't cause this creature to tap.)
Channel — {2}, Discard this card: Search your library for a basic Plains card, reveal it, put it into your hand, then shuffle. You gain 2 life.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations Jumpstart | 264 | Common | $0.35 | — |
| Kamigawa: Neon Dynasty | 39 | Common | $0.35 | $0.49 |
| Kamigawa: Neon Dynasty | 315 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 18 February 2022Discarding the card is part of the cost to activate a channel ability.
- 18 February 2022If a channel ability requires a target, you may not activate it without a target just to discard the card.