Crit, Multicast, Ammo and Lifesteal in The Bazaar

Crit Chance is the chance for an item with a cooldown to critically hit, doubling its Damage, Heal, Shield, Regen, Burn and Poison active effects. Multicast makes one use happen several times. Ammo caps how many times an item can fire in a fight. Lifesteal heals you for the damage the item deals.

How they combine

Keyword	Applies to	Interaction
Crit	Active effects of items with a cooldown	Doubles Damage, Heal, Shield, Regen, Burn and Poison of that use
Multicast	The whole use of the item	Multicast 2 on an Ammo item spends one use and fires twice
Ammo	Uses per fight	An empty item stops charging; Ammo refills after the fight
Lifesteal	Damage the item deals	Heals you by the damage dealt

Items without a cooldown cannot Crit. Patch 19.0 updated Tractor Beam’s tooltip to state that it is not an item that Crits.

Multipliers and double-dipping

Patch 12.0 stopped “doubling” effects from stacking with persistent percentage bonuses. Before the fix, an Obsidian Atlas Stone took its already-buffed damage as the base for its double and then doubled again. Hotfix 19.3 fixed the same kind of stacking on Light-up Sneakers and Mecha Dragon with Glass Cannon and One Shot One Kill.

Crit items after Patch 20.0

Item	Hero	Patch 20.0 text
Runic Claymore	Karnok	CD 7; Damage 300/600; Lifesteal; when you Haste, your items gain 10/20% Crit Chance; +Damage equal to 5 times its Crit Chance
Dual Reaver	Karnok	Damage 50; when you Haste or Slow this, gain 10/20/30% Crit Chance
Lost Blade	Karnok	CD 6; Multicast 2; Damage equal to 10% of your Max Health

Runic Claymore scales its own Damage with Crit Chance: at 40% Crit Chance it has +200 Damage before the Crit doubles the hit.

Ammo weapons after Patch 20.0

Vanessa’s Ammo weapons gained Damage: Cannon 50/100/200/400, Double Barrel 35/70/140/280 and Repeater 45. Heavy Crossbow (Karnok) has had Max Ammo 5 since Patch 19.0.