Cheapest priced copy (Core Set 2021 Promos): $0.99 at Card Kingdom, near mint, their price list as of .
Sporeweb Weaver 
Creature — Spider · 1/4 · Rare · Core Set 2021 · #378
Reach, hexproof from blue
Whenever this creature is dealt damage, you gain 1 life and create a 1/1 green Saproling creature token.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.99 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2021 | 208 | Rare | $1.29 | $1.49 |
| Core Set 2021 | 378 | Rare | $1.49 | $1.99 |
| Core Set 2021 Promos | 208p | Rare | $0.99 | $0.99 |
| Core Set 2021 Promos | 208s | Rare | — | $2.49 |
4 rulings from Wizards of the Coast
- 23 June 2020Hexproof from blue means that Sporeweb Weaver can't be the target of blue spells your opponents control or abilities your opponents control of blue sources.
- 23 June 2020Sporeweb Weaver's last ability triggers even if the damage causes it to die.
- 23 June 2020If your life total is brought to 0 or less at the same time that Sporeweb Weaver is dealt damage, you lose the game before the ability goes on the stack.
- 23 June 2020Sporeweb Weaver's last ability triggers just once, no matter how many things deal how much damage to it at once (most likely because two or more creatures blocked it).