UnitVirtuosoCost: 6ATK: 7 HP: 5
Your units and heroes have swift strike. (They deal combat damage before units and heroes without swift strike.)
It'll be over before you know it started.
NeutralFinesse Tech III

Card-Specific Rulings
Your units and heroes only keep swift strike from Blademaster's ability while he's still in play under your control. If he leaves play or leaves your control, he won't continue to grant swift strike. — Sirlin
Swift Strike Rulings
Combat damage is dealt simultaneously if the attacker and the thing it's attacking both have swift strike. — Sirlin
If swift strike damage kills a unit or hero in combat that does not have swift strike, the non-swift strike unit or hero dies before it gets a chance to deal combat damage. — Sirlin