ネクロバインダー

• Type: Skill
• Cost: 0
• Effect: Lose 2 Strength. Enemy loses 2 Strength. Exude.

Cost 0, both players lose 2 Strength, then Exude. A one-time debuff with a big self-downside, mitigated by the fact it leaves the deck via Exude.

In decks that don't use Strength at all (Ethereal decks, Doom decks), the self-downside is effectively zero — making this a free cost-0 "steal 2 Strength" card. Permanent -2 Strength on the enemy meaningfully reduces their damage output across the fight. Exude also keeps the deck clean. Bad in Osty-Attack decks that scale with Strength.

Rating: C-tier — effectively free in Strength-light decks; very narrow otherwise.

• Only pick in decks that don't care about Strength (Ethereal / Doom)
• Use and Exude on first draw to stop wasting energy on the card
• Apply to strong early-fight enemies / bosses to reduce their attack
• Do not include in Osty Attack decks — kills your own scaling

• Any Ethereal deck: no self-downside. Pure +2 Strength debuff for the enemy
• Friendship: +1 energy per turn. Even if Friendship's Strength cost hurts, Shared Fate doesn't add much pain
• Reaperform: scales on damage rather than Strength, so Shared Fate is tolerable
• Weaken: Weak/Frail-focused deck. Usually doesn't mind Strength loss
• Doomsday: Doom core. Decks built around Doomsday rarely care about Strength