Cheapest priced copy (Double Masters 2022): $0.35 at Card Kingdom, near mint, their price list as of .
Seeker of the Way 
Creature — Human Warrior · 2/2 · Uncommon · The List · #KTK-22
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast a noncreature spell, this creature gains lifelink until end of turn.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
6 printings · $0.35 to $0.69 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 28 | Common | $0.35 | $0.49 |
| Double Masters 2022 | 341 | Common | $0.35 | $0.49 |
| Magic Origins Clash Pack | 2 | Uncommon | — | $0.69 |
| Iconic Masters | 29 | Common | $0.35 | $0.49 |
| Khans of Tarkir | 22 | Uncommon | $0.35 | $0.49 |
| The List | KTK-22 | Uncommon | $0.35 | — |
4 rulings from Wizards of the Coast
- 20 September 2014Once it triggers, prowess isn't connected to the spell that caused it to trigger. If that spell is countered, prowess will still resolve.
- 20 September 2014Any spell you cast that doesn't have the type creature will cause prowess to trigger. If a spell has multiple types, and one of those types is creature (such as an artifact creature), casting it won't cause prowess to trigger. Playing a land also won't cause prowess to trigger.
- 20 September 2014Prowess goes on the stack on top of the spell that caused it to trigger. It will resolve before that spell.
- 17 November 2017Multiple instances of lifelink on the same creature are redundant.