This card is categorized as a block. When it is played it is able to prevent one attack from dealing damage to the user. It is only active for that round and it is discarded immediately after. If it is able to prevent damage from an attack, then the caster of that attack is dealt 1 damage. Its ability to block attacks is unrelated to its ability to prevent spells from being cast (which is also called a block). It has power 3. The minimum bid is 20 gold. It is able to block fire.