Anthrax

Description
Applying Poison deals 5 damage.

Strategy and Synergy
Solid artifact to pick up to use with Poison-deck, spells of said deck that are guaranteed to hit the enemy (i.e: ) will just proc a free 5 damage when cast. The benefit can further be reinforced with to increase it to 10 damage per spell cast.

Note that, unlike Ruby, Anthrax will only damage the targets hit with the spell and not all targets, so when using any deck other than poison-oriented ones, the Ruby is a better alternative than Anthrax.

Trivia
Anthrax is a real world infection with an incredibly high mortality rate.