Huatli, Warrior Poet — ruling 1

The greatest power among creatures you control is determined as Huatli's first ability resolves. If that number is negative, you won't gain or lose any life.

Huatli, Warrior Poet — ruling 2

You can activate Huatli's first ability even if you control no creatures. You simply won't gain any life.

Huatli, Warrior Poet — ruling 3

You divide the damage among the target creatures as you activate Huatli's last ability. Each target must be assigned at least 1 damage. If X is 0, you can't choose any targets.

Huatli, Warrior Poet — ruling 4

If some (but not all) of the targets become illegal, the original division of damage still applies, but no damage is dealt to illegal targets. If all targets become illegal, the ability won't resolve.

Huatli, Warrior Poet : règles, fonctionnement et interactions (MTG)

Huatli, Warrior Poet 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

+2: You gain life equal to the greatest power among creatures you control. 0: Create a 3/3 green Dinosaur creature token with trample. −X: Huatli deals X damage divided as you choose among any number of target creatures. Creatures dealt damage this way can't block this turn.

How it works : Huatli, Warrior Poet

Original English text — Wizards of the Coast / Scryfall

#1September 29, 2017· Wizards of the Coast
The greatest power among creatures you control is determined as Huatli's first ability resolves. If that number is negative, you won't gain or lose any life.
No other card is named in this ruling.
#2September 29, 2017· Wizards of the Coast
You can activate Huatli's first ability even if you control no creatures. You simply won't gain any life.
No other card is named in this ruling.
#3September 29, 2017· Wizards of the Coast
You divide the damage among the target creatures as you activate Huatli's last ability. Each target must be assigned at least 1 damage. If X is 0, you can't choose any targets.
No other card is named in this ruling.
#4September 29, 2017· Wizards of the Coast
If some (but not all) of the targets become illegal, the original division of damage still applies, but no damage is dealt to illegal targets. If all targets become illegal, the ability won't resolve.
No other card is named in this ruling.