Dagger — guide

In short

Dagger is a Rare Attack champion from Banner Lords with Void affinity, so he never lands weak hits. His kit is an AoE with Decrease DEF plus a single-target hit that punishes targets already under Decrease DEF, and his real home is the Banner Lords Crypt thanks to a +20% ATK aura. Build priority is Critical Rate and Accuracy — but the site author's verdict is vault/fusion material.

Strengths

• Lucky Sabotage: 3.65× ATK to all enemies with a 50% chance of 60% Decrease DEF for 2 turns — a working wave debuff.
• A2 into A3 combo: Sword Rift hits for 5.8× ATK and, if the target is under Decrease DEF, has a 50% chance to place 50% Decrease ATK instead of 25%.
• A1 hits twice, and every crit cuts 4% of the target's Turn Meter — noticeable on waves and on enemies without immunity.
• Aura gives allies +20% ATK in Faction Crypts, a real boost for a Crypt team.
• Rare and Void: cheap to book and no weak hits against any affinity.

Weaknesses

• Weak base stats: 1,387 ATK, 12,720 HP, 793 DEF and only 101 SPD — slow and squishy.
• Every debuff is a 50% coin flip, so he needs Accuracy and books to be reliable.
• No self-buff, shield or heal — he folds on waves without support or Lifesteal.
• Not competitive in Arena, Chimera or Hard mode (2.0–2.5).

Where to use

Best spot is the Banner Lords Crypt (3.5), where his aura and both debuffs help the whole team. Next comes Clan Boss (3.5) and Dungeons (3.0) — as a wave debuffer and a partner for someone else's Decrease DEF. Hydra (3.0) and Doom Tower (2.5) are filler damage. Arena (2.5) and Hard (2.0) are not his content: too slow, too fragile.

Stats and gear

Priority: Critical Rate up to ~100%, Accuracy 150+ for Crypt and dungeons (200+ for higher levels), SPD 170–190, then ATK% and C.DMG. Sets from the build list: Critical Rate to cap crit, Accuracy to land debuffs, Lifesteal for wave sustain. Gloves crit rate/C.DMG, chest ATK%, boots SPD.

Masteries and blessings

Take Pierce Defenses and Unstoppable from the build list, and fill the rest with a standard damage setup for an Attack role. Blessings: Phantom Touch for extra damage, Dark Resolve if he dies too early in the Crypt. Relics: Malefic Talon and Tempus Morbidia.

Tomes

Book Lucky Sabotage first — it improves both the debuff chance and the cooldown, so every tome upgrades his main skill. Then Sword Rift; leave A1 for last, since books don't improve the Turn Meter cut.

Verdict

The site author's call is blunt: vault (fusion), and if you have no alternative, he's your pick. Only worth investment to close out the Banner Lords Crypt.