This event has a special type of buff:
Conditional Buffs. These are activated by first fulfilling certain conditions, and stay in effect so long as the conditions remain met, only stopping when you fail to maintain the condition. First, though, let's take a look at the main buff that you'll need to use in order to achieve these special objectives:
Name: Flower Bouquet
Effect: Activates heartily buff effect
Target: Population building
Duration: 3 hours (22 hours on friend/guild members)
Price: 4 Flowers
Flower Bouquets can be made in your Provision House and Rarity Provision House by using Flowers. On their own, they provide a pretty love-filled buff effect on population buildings, but don't let that fool you into thinking they're just shiny fluff! If you have a certain amount of these buffs running concurrently on your home-island, you'll gain access to powerful zone-wide effects:
Name: Heart Lockets
Effect: +200% population growth
Targets: Mayor's House, Village School, University
Condition: Five (5) active Flower Bouquet buffs
Name: Family Day
Effect: +200% recruitment speed
Targets: Barracks, Elite Barracks
Condition: Ten (10) active Flower Bouquet buffs
Valentine Cards are another precursor buff that can be used to create lucrative effects:
Name: Buddy's Valentine Card Box
Effect: Rewards one of the Valentine Cards randomly
Production Time: 36 hours (Provision House), 6 hours (Rarity Provision House)
Cost: 4,400 Pinewood Planks, 780 Simple Paper, 660 Nibs
Upon making Buddy's Valentine Card Box, you'll be rewarded with one of 9 Valentine Cards, picked at random:
Name: Valentine Card
Effect: +300% Flower Farm production
Target: Flower Farms
Duration: 1 hour (3 hours on friend/guild members)
At face value, these appear as short but powerful buffs to your Flower Farm production, but something special happens when all three of your Flower Farms are buffed at the same time:
Name: Valentine
Effect: +200% to resources, refiller and XP!
Targets: Completed Co-op & Multiplayer adventures
Condition: Three (3) active Valentine Card buffs
As long as this conditional buff is active, the owner will be able to take advantage of increased loot from their cooperative adventures, including Flower Refills! So be sure to spread the love, and the reap even more rewards while you tackle some group-content! A zone-wide adventure loot boost buff is triggered once valentine card buffs are running on all three flower farms simultaneously. The zone-wide buff is stopped when the amount of simultaneously running valentine card buffs is below 3.
Premium Boost: The +50% premium boost is applied after the initial reward boost.
Example:
100% (Base) + 200% (Valentine Buff) = 300% Overall Reward
Overall Reward (300%) * 1,5 (Premium) = 450%