Cost: 2.

Uses (3 warrior counters). Max 1 per player.

Interrupt: When your hero attacks, remove 1 counter from here → that attack deals 1 additional damage.

Wolverine #16.
Warrior Skill

Best with attacks that deal their damage to multiple targets: Dive Bomb is the prime example, but other good cases like Melee and Ricochet Beam exist.

Note that this increases damage of one attack. Things that are explicitly multiple attacks, such as Dance of Death or Slice and Dice do not synergize well with this.

Fry · 242

On paper this card gives you 3 damage, spread out across three separate attacks, for 3ER. 3 damage for 3ER isn't too amazing, but I think there's real value in allowing you to assign damage more efficiently. For example, you can spend a use to get an extra card out of No Quarter or to one-shot one of the Sinister Six with Relentless Assault.

Tzeentch144 · 21
The key is using attacks that deal multiple sources of damage, as mentioned in Fry's review — Stretch22 · 557