Deadeye Brawler — ruling 1

Once you have the city’s blessing, you have it for the rest of the game, even if you lose control of some or all of your permanents. The city’s blessing isn’t a permanent itself and can’t be removed by any effect.

Deadeye Brawler — ruling 2

A permanent is any object on the battlefield, including tokens and lands. Spells and emblems aren’t permanents.

Deadeye Brawler — ruling 3

If you cast a spell with ascend, you don’t get the city’s blessing until it resolves. Players may respond to that spell by trying to change whether you get the city’s blessing.

Deadeye Brawler — ruling 4

If you control ten permanents but don’t control a permanent or resolving spell with ascend, you don’t get the city’s blessing. For example, if you control ten permanents, lose control of one, then cast Golden Demise, you won’t have the city’s blessing and the spell will affect creatures you control.

Deadeye Brawler — ruling 5

If your tenth permanent enters the battlefield and then a permanent leaves the battlefield immediately afterwards (most likely due to the “Legend Rule” or due to being a creature with 0 toughness), you get the city’s blessing before it leaves the battlefield.

Deadeye Brawler — ruling 6

Ascend on a permanent isn’t a triggered ability and doesn’t use the stack. Players can respond to a spell that will give you your tenth permanent, but they can’t respond to getting the city’s blessing once you control that tenth permanent. This means that if your tenth permanent is a land you play, players can’t respond before you get the city’s blessing.

Deadeye Brawler — ruling 7

Some cards have triggered abilities with an intervening “if” clause that checks whether you have the city’s blessing. These are worded “[Trigger condition], if you have the city’s blessing, [effect].” You must already have the city’s blessing in order for these abilities to trigger; otherwise they do nothing. In other words, there’s no way to have the ability trigger if you don’t have the city’s blessing, even if you intend to get it in response to the triggered ability.

Deadeye Brawler : règles, fonctionnement et interactions (MTG)

Deadeye Brawler 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

Deathtouch Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) Whenever this creature deals combat damage to a player, if you have the city's blessing, draw a card.

How it works : Deadeye Brawler

Original English text — Wizards of the Coast / Scryfall

#1January 19, 2018· Wizards of the Coast
Once you have the city’s blessing, you have it for the rest of the game, even if you lose control of some or all of your permanents. The city’s blessing isn’t a permanent itself and can’t be removed by any effect.
No other card is named in this ruling.
#2January 19, 2018· Wizards of the Coast
A permanent is any object on the battlefield, including tokens and lands. Spells and emblems aren’t permanents.
No other card is named in this ruling.
#3January 19, 2018· Wizards of the Coast
If you cast a spell with ascend, you don’t get the city’s blessing until it resolves. Players may respond to that spell by trying to change whether you get the city’s blessing.
No other card is named in this ruling.
#4January 19, 2018· Wizards of the Coast
If you control ten permanents but don’t control a permanent or resolving spell with ascend, you don’t get the city’s blessing. For example, if you control ten permanents, lose control of one, then cast Golden Demise, you won’t have the city’s blessing and the spell will affect creatures you control.
No other card is named in this ruling.
#5January 19, 2018· Wizards of the Coast
If your tenth permanent enters the battlefield and then a permanent leaves the battlefield immediately afterwards (most likely due to the “Legend Rule” or due to being a creature with 0 toughness), you get the city’s blessing before it leaves the battlefield.
No other card is named in this ruling.
#6January 19, 2018· Wizards of the Coast
Ascend on a permanent isn’t a triggered ability and doesn’t use the stack. Players can respond to a spell that will give you your tenth permanent, but they can’t respond to getting the city’s blessing once you control that tenth permanent. This means that if your tenth permanent is a land you play, players can’t respond before you get the city’s blessing.
No other card is named in this ruling.
#7January 19, 2018· Wizards of the Coast
Some cards have triggered abilities with an intervening “if” clause that checks whether you have the city’s blessing. These are worded “[Trigger condition], if you have the city’s blessing, [effect].” You must already have the city’s blessing in order for these abilities to trigger; otherwise they do nothing. In other words, there’s no way to have the ability trigger if you don’t have the city’s blessing, even if you intend to get it in response to the triggered ability.
No other card is named in this ruling.