Cheapest priced copy (Shadows over Innistrad): $0.35 at Card Kingdom, near mint, their price list as of .
Accursed Witch // Infectious Curse 
Creature — Human Shaman // Enchantment — Aura Curse · 4/2 · Uncommon · Shadows over Innistrad · #97
Spells your opponents cast that target this creature cost {1} less to cast.
When this creature dies, return it to the battlefield transformed under your control attached to target opponent.
Enchant player
Spells you cast that target enchanted player cost {1} less to cast.
At the beginning of enchanted player's upkeep, that player loses 1 life and you gain 1 life.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Shadows over Innistrad | 97 | Uncommon | $0.35 | $1.49 |
3 rulings from Wizards of the Coast
- 8 April 2016If an effect causes Accursed Witch to transform on the battlefield, rather than leaving it and returning transformed, then Infectious Curse doesn't become attached to any player and is put into your graveyard. This won't cause abilities that trigger when a creature leaves the battlefield to trigger.
- 8 April 2016Accursed Witch's first ability affects all spells cast by your opponents that target it, including Aura spells and spells that have additional targets. It doesn't affect abilities.
- 8 April 2016Infectious Curse's middle ability affects all spells you cast that target the enchanted player, including Aura spells and spells that have additional targets. It doesn't affect abilities.