Attack Boost

The Attack Boost is a feature of some buildings and items to increase the attack value of attacking units by a certain percentage. The attack boost can also be activated in the Friends Tavern by paying for it with Tavern Silver.

The attack boost only benefits the attacking units, units defending the city will not be affected. To increase the stats of the defending units players may use the defense boost.

When having multiple attack boosts, either from buildings or from items, those percentages are stacked. Then the unit's base attack value is increased by the result.

Attack Boost Providers for Attacking Army

The following sources increase the attack values of the players troops when they are used for attacking. This applies for attacking other players in the neighborhood, for attacking in the guild expedition encounters, for attacking on the GvG Maps, for fights on the Continent Maps, for fights in the Daily Challenges or for fights in the Guild Battlegrounds.

Great Buildings

Some of the Great Buildings offer a Military Boost or Advanced Tactics bonus, which beside increasing the attack value also increases the defense value of the attacking units. Great Buildings are the only option to boost the defense value of the attacking units.

	Building	Military Boost and Advanced Tactics
	Castel del Monte	Provides Military Boost Provides +3% attack boost at level 1 and +30% attack boost at level 10. After level 10 +1% attack boost is gained after every second level.
	Cathedral of Aachen	Provides Military Boost Provides +3% attack boost at level 1 and +30% attack boost at level 10. After level 10 +1% attack boost is gained after every second level.
	Statue of Zeus	Provides Military Boost Provides +3% attack boost at level 1 and +30% attack boost at level 10. After level 10 +1% attack boost is gained after every second level.
	Terracotta Army	Provides Advanced Tactics Provides +2% attack boost at level 1 and +20% attack boost at level 10. After level 10 +1% attack boost is gained after every second level. What makes the Terracotta Army different is that the stats of the defending army are also increased by the same amount.

Special Buildings

	Building	Attack Boost
	Altar of Artemis	Provides from +3% to +7% attack boost depending on the buildings age. Altar of Artemis is one of the six options when reaching level 5 with the Altar Garden.
	The Appleton Cottage	Provides from +5% to +13% attack boost depending on the buildings age. The Appleton Cottage is one of the three options when reaching level 7 with the September Cottage.
	Botanical Rotunda	Provides from +5% to +10% attack boost depending on the buildings age.
	Carousel	Provides from +4% to +8% attack boost depending on the buildings age. In addition to attack boost the Carousel also provides the same amount of defense boost.
	Checkmate Square	Provides from 5% to +10% attack boost depending on the buildings age.
	Classical Garden Pool	Provides +5% attack boost when adjacent to two other different buildings from the Classical Garden Set. The boost values remain constant through the ages.
	Colossus	Starts providing attack boost when upgraded to level 4 or more. Gives from 3% to +14% attack boost depending on the buildings level and the age.
	Contestants' Estate	Provides +3% attack boost. The boost values remain constant through the ages.
	Drummer School	Provides +4% attack boost. The boost value remains constant through the ages.
	Elephant Fountain	Provides from +2% to +9% attack boost when adjacent to at least four other building from the Indian Fountain Set. The boost value depends on the buildings age.
	Fire Pagoda	Provides from +6% to +12% attack boost depending on the buildings age. The Fire Pagoda is one of the three options when upgrading the Pagoda to level 7.
	Greater Runestone	Provides from +2% attack boost when upgraded to level 4 or more. The boost value remains constant through the ages.
	Halmbock	Provides +1% attack boost when adjacent to two other different buildings from the Winter Village Set or +3% attack boost when adjacent to three different buildings from the set. The boost values remain constant through the ages.
	Piazza Clock Tower	At level 1 provides from +2% to +7% attack boost when adjacent to three other different buildings from the Piazza Set. The boost values depends on the buildings age. At level 2 +4% to +9% attack boost is provided.
	Royal Marble Gateway	Provides from +2% to +7% attack boost depending on the buildings age.
	Pirate Guard Post	Provides from +1% to +2% attack boost depending on the buildings age.
	Sakura Rock	Provides +2% attack boost when adjacent to two other different buildings from the Cherry Garden Set or +5% attack boost when adjacent to three different buildings from the set. The boost values remain constant through the ages. At level 2 the Sakura Rock provides +4% attack boost when adjacent to two other buildings from the set or +10% attack boost when adjacent to three.
	Speaker's Corner	Provides from +5% to +10% attack boost depending on the buildings age.
	The Pirate Ship	Provides +8% attack boost. The boost value remains constant through the ages. The Pirate Ship is one of the three options when upgrading The Ship to level 7.
	Winners' Plaza	Provides from +2% to +6% attack boost depending on the buildings age.
	Yggdrasil	Provides from +6% to +30% attack boost depending on the buildings level. On the same level the boost value remains constant through the ages.
	Abandoned Asylum	Provides from +16% to +24% attack boost on the highest level, depending on the buildings age.

Military Buildings

From the Contemporary Era and onward some of the regular military buildings also provide attack boost.

Building	Boost	Era
Attack Helicopter Base	+4%	Contemporary Era
Strike Team Center	+4%	Contemporary Era
Stealth Tank Factory	+4%	Tomorrow Era
Ultra AP Factory	+4%	Tomorrow Era
Exoskeleton Factory	+5%	Future Era
Hover Tank Base	+5%	Future Era
Behemoth Hangar	+6%	Arctic Future
Dragon Drone Base	+7%	Arctic Future
Manta Bay	+7%	Oceanic Future
Nautilus Drop	+7%	Oceanic Future
Hidden School	+8%	Virtual Future
Rocket Range	+8%	Virtual Future

Items

Attacker boost items can be gained from the boost crate, events, Daily Challenges and Incidents. Items can only provide a temporary attack boost.
Attacker boosts can only be used one at a time. When choosing a second item, the player will be asked if they want to replace the acitvated item with the second one.

	Item	Attack Boost
	Small Attacker Boost	Provides +5% attack boost for 8h.
	Medium Attacker Boost	Provides +10% attack boost for 8h.
	Large Attacker Boost	Provides +20% attack boost for 8h.

Friends Tavern

A temporary attack boost can be activated in the Friends Tavern with Tavern Silver.

Item	Cost	Attack Boost
	750	Activates +10% attack boost for 30m.
	3,000	Activates +20% attack boost for 4h.
	8,500	Activates +30% attack boost for 24h.

Attack Boost Providers for Defending Army

The following sources increase the attack values of the players troops when they are used for defending. This applies only for the City Defense when the player is attacked by another player of their neighborhood.

Great Buildings

Some of the Great Buildings offer a Fierce Resistance or Advanced Tactics bonus, which beside increasing the defense value also increases the attack value of the defending units. Great Buildings are the only option to boost the attack value of the defending units.

Building		Fierce Resistance and Advanced Tactics
	Deal Castle	Provides Fierce Resistance Provides +3% attack boost at level 1 and +30% attack boost at level 10. After level 10 +1% attack boost is gained after every second level.
	Saint Basil's Cathedral	Provides Fierce Resistance Provides +3% attack boost at level 1 and +30% attack boost at level 10. After level 10 +1% attack boost is gained after every second level.
	Terracotta Army	Provides Advanced Tactics Provides +2% attack boost at level 1 and +20% attack boost at level 10. After level 10 +1% attack boost is gained after every second level. What makes the Terracotta Army different is that the stats of the offensive army are also increased by the same amount.