Crusader's Shield

Armorcommon

A bronze boss is set in the center of this round shield. When you attune to the shield, the boss changes shape, becoming a symbol of your divine connection: a holy symbol for a cleric or paladin or an engraving of mistletoe or other sacred plant for a druid. You can use the shield as a spellcasting focus for your spells.

Source: Vault of Magic · OGL-1.0a · 5.1