Clackbridge Troll — ruling 1

If a player sacrifices a creature for any other reason (perhaps because it's a Food and the player was hungry), Clackbridge Troll's ability won't tap it or cause you to gain life or draw a card.

Clackbridge Troll — ruling 2

When Clackbridge Troll's last ability resolves, the next opponent in turn order chooses whether they want to sacrifice a creature at all and which creature to sacrifice if so, then each other opponent in turn order does the same, knowing the choices made before them. Then all the chosen creatures are sacrificed at the same time. If one or more creatures were sacrificed this way, Clackbridge Troll is tapped and you gain 3 life and draw a card—you don't gain more life or draw more cards if more than one creature was sacrificed.

Clackbridge Troll : règles, fonctionnement et interactions (MTG)

Clackbridge Troll 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

Trample, haste When this creature enters, target opponent creates three 0/1 white Goat creature tokens. At the beginning of combat on your turn, any opponent may sacrifice a creature of their choice. If a player does, tap this creature, you gain 3 life, and you draw a card.

How it works : Clackbridge Troll

Original English text — Wizards of the Coast / Scryfall

#1October 4, 2019· Wizards of the Coast
If a player sacrifices a creature for any other reason (perhaps because it's a Food and the player was hungry), Clackbridge Troll's ability won't tap it or cause you to gain life or draw a card.
No other card is named in this ruling.
#2October 4, 2019· Wizards of the Coast
When Clackbridge Troll's last ability resolves, the next opponent in turn order chooses whether they want to sacrifice a creature at all and which creature to sacrifice if so, then each other opponent in turn order does the same, knowing the choices made before them. Then all the chosen creatures are sacrificed at the same time. If one or more creatures were sacrificed this way, Clackbridge Troll is tapped and you gain 3 life and draw a card—you don't gain more life or draw more cards if more than one creature was sacrificed.
No other card is named in this ruling.