Carapace — ruling 1

This leaves the battlefield when you activate its activated ability, but the enchanted creature won't be regenerated until the ability resolves. In the intervening time, the creature will no longer have the bonus that this had been giving it. This may cause the creature to be destroyed before the regeneration shield is created.

Carapace : règles, fonctionnement et interactions (MTG)

Carapace is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Enchant creature Enchanted creature gets +0/+2. Sacrifice this Aura: Regenerate enchanted creature.

How it works : Carapace

Original English text — Wizards of the Coast / Scryfall

#1October 4, 2004· Wizards of the Coast
This leaves the battlefield when you activate its activated ability, but the enchanted creature won't be regenerated until the ability resolves. In the intervening time, the creature will no longer have the bonus that this had been giving it. This may cause the creature to be destroyed before the regeneration shield is created.
No other card is named in this ruling.