Osty Build
Osty builds treat the companion hand not as a side mechanic, but as the main engine. Summon, healing, and attack chaining all contribute to making Osty the center of the deck.
"Best for players who enjoy companion-centric scaling and durable setup plans."
Osty builds treat the companion hand not as a side mechanic, but as the main engine. Summon, healing, and attack chaining all contribute to making Osty the center of the deck.
Core plan Keep Osty alive, scale its impact with summon and attacks, and turn companion growth into your main win condition.
Strengths
- Excellent tank potential
- Unique scaling axis
- Can convert summon into offense and durability
Weaknesses
- Slower setup
- Requires synergy density
- Can brick if support is thin
We categorize resources into Core, Support, and Payoff. A build becomes "real" only when these three layers synchronize.
Core Cards
Primary enablers that define this mechanic's direction.
Support Cards
Stability tools that ensure consistency and survival.
Payoff Cards
The 'win conditions' that convert setup into overwhelming power.
Necro Mastery
Summon 5. Whenever Osty loses HP, ALL enemies lose that much HP as well.
Sacrifice
Retain. If Osty is alive, he dies and you gain Block equal to double his Max HP.
Sic Em
Osty deals 5 damage. Whenever Osty hits this enemy this turn, Summon 2.
Niche & Situational
Additional cards that synergize under specific conditions.
Bone Shards
If Osty is alive, he deals 9 damage to ALL enemies and you gain 9 Block. Osty dies.
Calcify
Osty's attacks deal 4 additional damage.
Flatten
Osty deals 12 damage. This card costs 0 if Osty has attacked this turn.
High Five
Osty deals 11 damage and applies 2 Vulnerable to ALL enemies.
Poke
Osty deals 6 damage.
Protector
Osty deals 10 damage. Deals additional damage equal to Osty's Max HP.
Rattle
Osty deals 7 damage. Hits an additional time for each other time he has attacked this turn.
Snap
Osty deals 7 damage. Add Retain to a card in your Hand.
Spur
Retain. Summon 3. Osty heals 5 HP.
Squeeze
Osty deals 25 damage. Deals 5 additional damage for ALL your other Osty Attacks.
Unleash
Osty deals 6 damage. Deals additional damage equal to Osty's current HP.
Synergistic Relics
Passive items that amplify this build's ceiling.
Anchor
Start each combat with 10 Block.
Bone Flute
Whenever Osty attacks, gain 2 Block.
Captain's Wheel
At the start of your 3rd turn, gain 18 Block.
Cloak Clasp
At the end of your turn, gain 1 Block for each card in your Hand.
Daughter of the Wind
Whenever you play an Attack, gain 1 Block.
Anchor???
Start each combat with 4 Block.
Orichalcum???
If you end your turn without Block, gain 3 Block.
Fresnel Lens
Whenever you add a card that gains Block to your Deck, Enchant it with Nimble 2.
Hand Drill
Whenever you break an enemy's Block, apply 2 Vulnerable.
Horn Cleat
At the start of your 2nd turn, gain 14 Block.
Intimidating Helmet
Whenever you play a card that costs or more, gain 4 Block.
Orichalcum
If you end your turn without Block, gain 6 Block.
Ornamental Fan
Every time you play 3 Attacks in a single turn, gain 4 Block.
Pael's Legion
Doubles Block gained from a card, then goes to sleep for 2 turns.
Parrying Shield
If you end a turn with at least 10 Block, deal 6 damage to a random enemy.
Permafrost
The first time you play a Power each combat, gain 6 Block.
Ripple Basin
If you did not play any Attacks during your turn, gain 4 Block.
Sai
At the start of your turn, gain 7 Block.
Seal of Gold
At the start of your turn, spend 5 Gold to gain . Self-Forming Clay · Ironclad Uncommon Whenever you lose HP in combat, gain 3 Block next turn.
Sturdy Clamp
Up to 10 Block persists across turns.
The Abacus
Whenever you shuffle your Draw Pile, gain 6 Block.
The Boot
Whenever you would deal 4 or less unblocked attack damage, increase it to 5.
Tuning Fork
Every time you play 10 Skills, gain 7 Block.
Vambrace
The first time you gain Block from a card each combat, double the amount gained.
Strategic Potions
Emergency tools to bridge gaps in difficult elite matchups.
Pro Tip: Balance your shell
"If your deck only has payoffs, it's a glass cannon that will misfire. If it only has support, you'll eventually be out-scaled. Look for the Golden Ratio between establishment, consistency, and victory."
Build FAQ
What is the core idea behind Osty Build?
The goal is to identify the mechanic that actually wins fights, then build around enough support pieces to make that plan reliable.
Do I need every core card to make Osty Build work?
No. In Early Access, most builds are better understood as directions rather than exact decklists. What matters most is whether you have enough engine, support, and payoff to make the build coherent.
Why does this page separate core, support, and payoff?
Because a strong build is not just a list of good cards. Core pieces enable the mechanic, support pieces keep the build consistent, and payoff pieces convert that setup into real combat power.