Strange Killstreak Festive Axtinguisher

(Medics Killed That Have Full ÜberCharge: 1)
Killstreaks Active
Mini-crits burning targets and extinguishes them.
Damage increases based on remaining duration of afterburn
Killing blows on burning players grant a speed boost.
-33% damage penalty
No random critical hits
This weapon holsters 35% slower
”On equip: +80% class viability”