Cheapest priced copy (Hour of Devastation): $0.35 at Card Kingdom, near mint, their price list as of .
Spellweaver Eternal 
Creature — Zombie Snake Wizard · 2/1 · Common · Hour of Devastation · #46
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Afflict 2 (Whenever this creature becomes blocked, defending player loses 2 life.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Hour of Devastation | 46 | Common | $0.35 | $0.49 |
4 rulings from Wizards of the Coast
- 14 July 2017If multiple creatures block a creature with afflict, afflict triggers only once.
- 14 July 2017Afflict resolves before combat damage is dealt. If this loss of life brings a player to 0 life or less, that player loses the game immediately. A blocking creature with lifelink won't deal combat damage in time to save that player.
- 14 July 2017Afflict causes the defending player to lose life; it's not damage or combat damage.
- 28 July 2023If a creature is attacking a planeswalker, that planeswalker's controller is the defending player. If a creature is attacking a battle, that battle's protector is the defending player.