If the bread is dropped 0 hp, they make a wisdom saving throw of 5 + half the damage taken. On a successful saving throw, the bread's consciousness goes into the biggest portion of the remaining bread, and the next biggest portion explodes in a fireball, not harming the other parts of the bread, but anything else in the vicinity of the explosion.

The largest portion of the bread is revived at half health. 

The bread has an advantage on all magical saving throws, and halves all magical damage. 

The bread is vulnerable to slashing, taking double damage.

The bread may cast counter-spell as a reaction. 

Bread has no arms or legs. They cannot move without assistance and cannot wield weapons. Mage hand, however, can carry up to 5 pounds. 

The bread can cast a choice of Control Flame, Control Water, Mold Earth or Gust for 1 action. They may do this an infinite amount of times, without expending any spell slots or needing to memorize or know the spell. 

For the price of being helplessly handles, you no longer need verbal, somatic or material components to cast spells. Think of it as an apology from your god for forgetting to build you proper.