What happens if you eat a destroying angel?

Deadly. Amatoxin poisoning with the same delayed onset and false-recovery pattern as the death cap. Emergency treatment is required and outcomes depend heavily on how early it starts.

Destroying Angel vs Puffball

The test that settles it

Slice it vertically. A puffball is featureless white; an Amanita button shows a mushroom shape inside.

Read this before anything else

Never eat a wild mushroom identified by a website or an app.That includes this one. These tools narrow possibilities; they cannot see your mushroom, its base, its smell or its habitat, and the difference between a meal and a liver transplant is sometimes a feature buried in the soil.
Get it confirmed in person by an experienced local forager or a mycological society. Most regions have one, most run free identification sessions, and they will look at the actual specimen.
Dig, do not pull. The cup at the base of a death cap is often underground. Pulling the mushroom leaves the most important feature in the soil.
If someone has eaten a wild mushroom and feels unwell, call poison control now — in the US, 1-800-222-1222. Do not wait for symptoms to worsen. Amatoxin poisoning has a false recovery phase, and delayed treatment is what makes it fatal. Save any uneaten pieces for identification.

Destroying Angel

Can kill

Amanita bisporigera and relatives

Under the cap: gills
Spore print: white
Growing on: soil, hardwood litter, conifer litter
Stem: White, often slightly shaggy, with a delicate ring near the top and a prominent membranous cup at the base.
If eaten: Deadly. Amatoxin poisoning with the same delayed onset and false-recovery pattern as the death cap. Emergency treatment is required and outcomes depend heavily on how early it starts.

Puffball

No known toxins

Lycoperdon and Calvatia species

Under the cap: none
Spore print
Growing on: grass, soil, hardwood litter
Stem: Absent, or a short sterile base.
If eaten: True puffballs have no significant toxins while pure white inside. The danger is not the puffball but what can be mistaken for one: a button-stage death cap looks like a small white ball until you cut it. Cut every single one.

Confirming destroying angel

Completely white — cap, gills, stem and spore print.
Ring on the stem and a membranous sac at the base.
Growing from the ground, never on wood.
Gills free of the stem, not running down it.

Confirming puffball

Cut every specimen in half from top to bottom. The inside must be uniformly white, firm and featureless, like a marshmallow.
If you see the faint outline of a cap, gills or a stem inside, it is a young Amanita — possibly a death cap — and not a puffball.
If the inside is yellow, olive or brown, it is either a maturing puffball or an earthball, and neither should be eaten.
No gills, no stem, no ring, no volva on the outside.

Still not certain?

Then you have your answer, and it is not to eat it. Run the full key, then take the specimen to someone who can hold it.

Identify it step by step