Hat Trick — ruling 1

A creature with triple strike deals combat damage up to three times per combat: once along with other creatures with first strike (or double strike or triple strike), again with creatures without those abilities, and again along with creatures with last strike (an Un- game exclusive). The creature must survive each combat damage step in order to deal combat damage in the next one.

Hat Trick — ruling 2

Additional hats won't give the creature more "strikes," but we like your spirit.

Hat Trick — ruling 3

A hat is a garment worn on the head that's not part of another garment. Hoodies, for example, are not hats. Items that cover only the face and not the top of the head, such as a face mask, are also not hats. Hats are purposely decorative. Simply balancing a thing on your head doesn't make that thing a hat.

Hat Trick — ruling 4

Key in this set—space helmets are not hats, although some creatures with space helmets also are wearing hats underneath those helmets.

Hat Trick — ruling 5

Wigs and headbands count as hats. There are wig and headband stickers.

Hat Trick — ruling 6

The above information pertaining to hats for creatures also pertains to actual hats for players.

Hat Trick — ruling 7

A creature "has a hat" if the creature depicted in the art is in possession of a hat. That creature doesn't need to be wearing the hat. A background character such as a scale bird having a hat won't count.

Hat Trick — ruling 8

You "have a hat" if you have a hat with you, not if you own one somewhere. You don't have to be wearing the hat. But if you have a hat with you, why wouldn't you be wearing it? Does it not fit? Is it for a sports team that's bad? Did you just get your hair done? We're just curious. You don't have to explain.

Hat Trick : règles, fonctionnement et interactions (MTG)

Hat Trick 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

Target blocking or blocked creature you control gets +1/+1 and gains first strike until end of turn. If it has a hat, it gains double strike until end of turn. If you and that creature each have a hat, the creature gains triple strike until end of turn.

How it works : Hat Trick

Original English text — Wizards of the Coast / Scryfall

#1October 7, 2022· Wizards of the Coast
A creature with triple strike deals combat damage up to three times per combat: once along with other creatures with first strike (or double strike or triple strike), again with creatures without those abilities, and again along with creatures with last strike (an Un- game exclusive). The creature must survive each combat damage step in order to deal combat damage in the next one.
No other card is named in this ruling.
#2October 7, 2022· Wizards of the Coast
Additional hats won't give the creature more "strikes," but we like your spirit.
No other card is named in this ruling.
#3October 7, 2022· Wizards of the Coast
A hat is a garment worn on the head that's not part of another garment. Hoodies, for example, are not hats. Items that cover only the face and not the top of the head, such as a face mask, are also not hats. Hats are purposely decorative. Simply balancing a thing on your head doesn't make that thing a hat.
No other card is named in this ruling.
#4October 7, 2022· Wizards of the Coast
Key in this set—space helmets are not hats, although some creatures with space helmets also are wearing hats underneath those helmets.
No other card is named in this ruling.
#5October 7, 2022· Wizards of the Coast
Wigs and headbands count as hats. There are wig and headband stickers.
No other card is named in this ruling.
#6October 7, 2022· Wizards of the Coast
The above information pertaining to hats for creatures also pertains to actual hats for players.
No other card is named in this ruling.
#7October 7, 2022· Wizards of the Coast
A creature "has a hat" if the creature depicted in the art is in possession of a hat. That creature doesn't need to be wearing the hat. A background character such as a scale bird having a hat won't count.
No other card is named in this ruling.
#8October 7, 2022· Wizards of the Coast
You "have a hat" if you have a hat with you, not if you own one somewhere. You don't have to be wearing the hat. But if you have a hat with you, why wouldn't you be wearing it? Does it not fit? Is it for a sports team that's bad? Did you just get your hair done? We're just curious. You don't have to explain.
No other card is named in this ruling.
#9October 7, 2022· Wizards of the Coast
You're "wearing a hat" if you're wearing a hat.
No other card is named in this ruling.
#10October 7, 2022· Wizards of the Coast
No player can remove another player's hat. That's unsporting conduct.
No other card is named in this ruling.