Brash Taunter

Bracket

• B1 Exhibition — Not in the same deck as its two-card combo partners: Dawnsire, Sunstar Dreadnought, Fire Covenant, Aetherflux Reservoir
• B2 Core — Not in the same deck as its two-card combo partners: Dawnsire, Sunstar Dreadnought, Fire Covenant, Aetherflux Reservoir
• B3 Upgraded — Not in the same deck as its early two-card combo partner: Aetherflux Reservoir
• B4 Optimized — allowed: No restriction beyond the banned list
• B5 cEDH — allowed: No restriction beyond the banned list

Why

• Two-card combo with Dawnsire, Sunstar Dreadnought, Fire Covenant, Aetherflux Reservoir (early with Aetherflux Reservoir)

How Lotus Vault estimates a bracket

Bracket: Lotus Vault analysis, with Commander Spellbook flags

Combos

52 known combos, 3 of them two-card.

• Dawnsire, Sunstar Dreadnought + Brash Taunter
  Produces: Near-infinite damage to one opponent
  View on Commander Spellbook
• Wayta, Trainer Prodigy + Cacophodon + Brash Taunter
  Produces: Infinite damage
  View on Commander Spellbook
• Guilty Conscience + Brash Taunter
  Produces: Infinite damage to one opponent
  View on Commander Spellbook

Combos: Commander Spellbook

Rulings

• 2020-06-23 · Wizards of the Coast
  If the target creature is an illegal target when Brash Taunter's last ability tries to resolve, the ability doesn't resolve. If Brash Taunter is no longer on the battlefield, the target creature won't deal or be dealt damage.
• 2020-06-23 · Wizards of the Coast
  If your life total is brought to 0 or less at the same time that Brash Taunter is dealt damage, you lose the game before its middle ability goes on the stack.
• 2020-06-23 · Wizards of the Coast
  A creature can be dealt an amount of damage greater than its toughness. For example, if Brash Taunter is dealt 3 damage, its middle ability deals 3 damage, not 1, to the target opponent.

Rulings: Scryfall · Wizards of the Coast