Fevered Visions — ruling 1

No player may take any action in between the two steps of Fevered Visions's triggered ability, so if your opponent has four or more cards in hand after drawing a card, Fevered Visions will deal 2 damage to that player.

Fevered Visions : règles, fonctionnement et interactions (MTG)

Fevered Visions 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

At the beginning of each player's end step, that player draws a card. If the player is your opponent and has four or more cards in hand, this enchantment deals 2 damage to that player.

How it works : Fevered Visions

Original English text — Wizards of the Coast / Scryfall

#1April 8, 2016· Wizards of the Coast
No player may take any action in between the two steps of Fevered Visions's triggered ability, so if your opponent has four or more cards in hand after drawing a card, Fevered Visions will deal 2 damage to that player.
No other card is named in this ruling.