Tibalt, the Fiend-Blooded — ruling 1

The number of cards in the target player's hand is determined when Tibalt's second ability resolves.

Tibalt, the Fiend-Blooded — ruling 2

When Tibalt's third ability resolves, all creatures will become untapped and gain haste, including ones you controlled before the ability resolved.

Tibalt, the Fiend-Blooded : règles, fonctionnement et interactions (MTG)

Tibalt, the Fiend-Blooded 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

+1: Draw a card, then discard a card at random. −4: Tibalt deals damage equal to the number of cards in target player's hand to that player. −6: Gain control of all creatures until end of turn. Untap them. They gain haste until end of turn.

How it works : Tibalt, the Fiend-Blooded

Original English text — Wizards of the Coast / Scryfall

#1May 1, 2012· Wizards of the Coast
The number of cards in the target player's hand is determined when Tibalt's second ability resolves.
No other card is named in this ruling.
#2May 1, 2012· Wizards of the Coast
When Tibalt's third ability resolves, all creatures will become untapped and gain haste, including ones you controlled before the ability resolved.
No other card is named in this ruling.