Dave's Killer Bread

You touch a loaf of bread. The bread Animates and grows in size, becoming a Huge Monstrosity under your control until the spell ends, the Bread drops to 0 hit points, or your concentration is broken.

The Bread uses the statistics of an elephant. In addition, every time the Bread takes 10 or more damage in a single turn, a slice is cut out of it. The Bread's maximum hitpoints are reduced by 10 and the slice becomes a creature with the statistics of a velociraptor. Each Slice is similarly under your control.

If your concentration is broken, the Bread doesn't revert to an object. Instead, you loose control of the Bread and any of its slices, and it becomes hostile towards you and your companions, attacking whoever smells the most yeasty. An unleashed Killer Bread can't be dismissed by you, and it and any Slices revert 1 hour after you transformed it.