A Faction Bonus is the specific bonus individual factions get. A Full Faction deck gets a large bonus, and a Split Deck gets a smaller bonus from both factions. This bonus makes up part of the faction's flavor and is part of what defines it as a faction.
Bonuses by Faction[]
Protectorate Factions
Forglar Swamp
15/15: You recover 3 Nora at the start of each turn.
Full Faction: You recover 6 Nora at the start of each turn.
Ironfist Stronghold
15/15: Champions you control take 3 less damage from spells.
Full Faction: Champions you control take 6 less damage from spells.
K'Thir Forest
15/15: Champions you control have +1 maximum AP.
Full Faction: Champions you control have +1 SPD and +1 maximum AP.
Savage Tundra
15/15: Champions you control have +5 maximum HP.
Full Faction: Champions you control have +10 maximum HP.
Wrath Factions
Forsaken Wastes
15/15: Champion runes you own have their cooldowns reduced by 30%.
Full Faction: Champion runes you own have their cooldowns reduced by 60%.
Sundered Lands
15/15: Champions you control take 10% less damage (after DEF), with a minimum reduction of 1, from attacks.
Full Faction: Champions you control take 20% less damage (after DEF), with a minimum reduction of 1, from attacks.
Underdepths
15/15: Champions you control with a maximum range of 3 or less receive a +2 DMG buff. Champions you control with a maximum range above 3 receive a +1 DMG buff.
Full Faction: Champions you control with a maximum range of 3 or less receive a +4 DMG buff. Champions you control with a maximum range above 3 receive a +2 DMG buff.
15/15: Whenever you deploy a Champion, you gain 4% of its Nora cost. When that champion is destroyed, you gain 2% of its Nora cost.
Full Faction: Whenever you deploy a Champion, you gain 8% of its Nora cost. When that champion is destroyed, you gain 4% of its Nora cost.