Shield of Undying

An expensive endgame shield crafted by combining a shield, totem of undying, and a netherite ingot. Perhaps in a more elegant shape, such as a heater shield.

Works like a regular shield, but is destroyed like a totem if player loses all health, giving the player the same effects as if they had just used a totem. 

Some players prefer holding a totem, but find it visually obtrusive in the offhand slot. This would allow the usefulness of a totem, with the fun of a shield. Because a netherite ingot is required, and the shield is destroyed upon death, there would be a costly risk to use such a powerful item.