
The Shadow
When Yuuna goes below 75% Max HP, she gains Stealth for 4 seconds. Triggers once per combat.
Whenever Yuuna gains Stealth, she gains 40 Mana and permanently gains 5 (+5 per rank) Crit.
The Professional
“I will not let our guild down.”
A melee Assassin whose Shuriken Shadow Strike throws one shuriken per 40 Crit (up to 10) at the enemy with the lowest HP. Stack Crit. The Shadow gains Mana and permanent Crit from stealth, The Collector adds shuriken and Shards, and The Nightshade gives +150% Crit against Poisoned enemies, which suits Pimenta and Pollen.

Leap into the air and throw 1 (+1 per 40 Crit) shurikens at the lowest-health enemy for 150 (+150% Attack) (+150% Magic) damage each.
Max Shurikens: 10
At B rank you pick one of three. Tap the cards to compare.

When Yuuna goes below 75% Max HP, she gains Stealth for 4 seconds. Triggers once per combat.
Whenever Yuuna gains Stealth, she gains 40 Mana and permanently gains 5 (+5 per rank) Crit.

Shuriken Shadow Strike fires an additional shuriken.
On kill, gain 1d5 Shards then permanently increase the Shards generated from this ability by 1. Triggers once per combat.

Shuriken Shadow Strike gains +150% Crit against Poisoned enemies.
Whenever an Assassin Crits, they inflict 4 (+4 per rank) Poison. Backup.
Specializations, upgrades and items players picked for Yuuna in shared builds. Each shows the pick rate (bold), the clear rate of builds with that pick, and the number of builds.
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Picked from the game data to match Yuuna's mechanics, class and the stats their abilities scale with. The tags before each item name say why.

+15 Crit+25 Attack
If this item is held by an Assassin, double its stats.

+15 Crit+25 Magic
If this item is held by an Assassin, double its stats.

+15 Crit+15 Omnivamp
On kill, if held by an Assassin this item gains 4 Crit.

+15 Crit+25 Attack+25 Magic
Quest Crit 10 times.
Reward Gain 15 Shards.

+15 Crit+12 Attack+12 Magic
On cast, gain 30 Attack.
On auto attack, gain 2 Magic.

+45 Crit
The holder counts as an Assassin during combat. If they were already an Assassin, they gain +30% Crit.
A and S rank upgrades are class upgrades: the options come from the hero's class, not the hero (game tutorial). In the current data the A and S rank options are the same list. S rank heroes also get one more item slot. Expand to see the options.

On Crit, inflict 1 (+10% Crit) Poison on the target.

Gain +80% Crit against enemies with Poison.

Rush abilities last 3 seconds longer. Backup.

At start of combat, inflict 30 (+50% Crit) Poison on all enemies.

At start of combat, if this Hero is in the front row they gain (+250% Crit) Defense.

On Crit, heal (+50% Crit) health and gain 3 Mana.

On Rush trigger, Assassins gain 15 Crit, 15 Attack, and 15 Magic. Backup.

On Crit, permanently gain 1 Attack and 1 Magic.

For Rush (10), gain +100% Crit.

Every other Crit, gain 1 Shard.

On kill, gain 8 Shards.

For Rush (10), Assassins gain 1 Crit per Shard in bank. Backup.

At start of combat, gain Stealth for 5 seconds.
On kill, gain Stealth for 5 seconds.

At start of combat, if this Hero is in the back row they gain +100% Crit and Stealth for 5 seconds.

Gain 60 Crit and 20 Omnivamp.
How to read the numbers: base value (+N% Stat) adds N% of that stat, (+A per B Stat) adds A for every B of that stat, and values split by slashes (/) are per rank.