Ezuri's Predation — ruling 1

Players can't cast spells or activate any abilities in between the Beasts entering the battlefield and fighting the other creatures. If the Beasts entering the battlefield cause any abilities to trigger, those abilities will be put onto the stack after Ezuri's Predation is finished resolving.

Ezuri's Predation — ruling 2

You choose which Beast is fighting which creature an opponent controls.

Ezuri's Predation — ruling 3

Each of the "fights" happens at the same time.

Ezuri's Predation — ruling 4

If Ezuri's Predation creates more than one token for any given creature (due to an effect such as the one Doubling Season creates), the extra tokens won't fight any creature.

Ezuri's Predation : règles, fonctionnement et interactions (MTG)

Ezuri's Predation 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

For each creature your opponents control, create a 4/4 green Phyrexian Beast creature token. Each of those tokens fights a different one of those creatures.

How it works : Ezuri's Predation

Original English text — Wizards of the Coast / Scryfall

#1November 4, 2015· Wizards of the Coast
Players can't cast spells or activate any abilities in between the Beasts entering the battlefield and fighting the other creatures. If the Beasts entering the battlefield cause any abilities to trigger, those abilities will be put onto the stack after Ezuri's Predation is finished resolving.
No other card is named in this ruling.
#2November 4, 2015· Wizards of the Coast
You choose which Beast is fighting which creature an opponent controls.
No other card is named in this ruling.
#3November 4, 2015· Wizards of the Coast
Each of the "fights" happens at the same time.
No other card is named in this ruling.
#4November 4, 2015· Wizards of the Coast
If Ezuri's Predation creates more than one token for any given creature (due to an effect such as the one Doubling Season creates), the extra tokens won't fight any creature.
No other card is named in this ruling.