Up for sale is the pointy Armor of Thorns, a common card from the Mirage expansion of Magic: the Gathering. This is the original, black-bordered, English version.
Armor of Thorns: Enchantment (Aura - Enchant non-Black Creature); you may play Armor of Thorns any time you could play an Instant; if it was played any time a Sorcery couldn't have been played, it gains substance until end of turn and when it loses substance, sacrifice it; enchanted Creature gets +2/+2; casting cost 1G.
These cards are all in at least Very Fine condition, with most being in unplayed, Mint/Near Mint condition.