Charm

Charm is a precept mod for the to grant a random buff to its owner, indicated by a special icon next to its owner's health and shields.
==Stats==
Rank	Chance	Cooldown	Cost
0 	10% 	30s 	0
1 	20% 	29s 	1
2 	30% 	28s 	2
3 	40% 	27s 	3
==Acquisition==
Charm is automatically acquired upon obtaining a .
==List of Possible Buffs==
The duration of the buffs below are for a fully-ranked Charm. When the player receives a buff (apart from Rare Resource), a charm icon will appear to the top right corner of the HUD, it will also display for a brief time what kind of buff it is.
Buff 	Effect 	Duration 	Chance
Critical Chance Bonus	Sets critical hit chance to 200% if it's lower than 200%. Also affects some Warframe powers.	30s 	10%
Energy Refund 	All energy expenditure from Warframe abilities is refunded for 10 seconds. 	10s 	20%
Tripled Affinity 	Any affinity earned is tripled. 	120s 	10%
Instant Reload 	Reload instantly once. 	Until reload	25%
Reinforced Shields 	Negates damage received from the next incoming hit. Additionally, awards 150 overshields. 	Until hit 	25%
Rare Resource 	The Smeeta creates 1 instance of the current system's rare resources for its owner:
* Void: 
* Zariman: 
* Sanctum Anatomica:	N/A 	10%
==Average Time for a Buff Occurrence==
The average time for a specific buff to occur is given by the formula
::m_{b} = \frac{t}{\text{Proc Chance * Buff Chance}}
where mb is the average wait time and t is the cooldown indicated on the mod. So the mb for a Rank 3 Charm to give triple affinity is:
::s
This means for that one specific buff to occur with a max rank mod, the average time to wait is 11 minutes 15 seconds.
Alternatively, the average time for any given buff to occur with a max rank mod is 
s
where 1 is equivalent to the sum of the chance of all buffs (100%).
==Notes==
*Each instance of a buff has their own timer and are stackable; they do not overwrite each other. However, the HUD only shows the timer for the latest instance of a buff.
*Every 27s there is a 40% chance to receive a random buff out of 6 buffs, getting a Triple Affinity Buff out of the 6 buff pool is , getting the buff twice in a row is , the duration of each buff is 120s which means at most there can only be 5 possible instances active at the same time. The chance of that is happening is .
**Buffs durations can be extended using .
***With each duration can increase to 156s, meaning 6 instances are possible. The chance of this happening is .
***Keeping in mind that all Affinity buffs are multiplicative, stacking an Affinity Booster(x2), an Affinity Blessing(+25% base Affinity gain), during an Affinity Weekend Booster(x2) adds up to 500% Affinity gain. Adding in the Double Affinity buff from Charm, it will stack respectively to 1,500% Affinity on one buff, 4,500% on two, 13,500% on three, 40,500% on four, 121,500% on five, and an immense 364,500% on 6 consecutive buffs. For reference, a Heavy Gunner worth 5,000 Affinity regularly would award an astounding 18,225,000 Affinity on kill.
*The Reinforced Shields buff can trigger on Warframes without Shields, but will not grant Overshields to them. It can also trigger when at maximum Overshields on other Warframes.
*The Energy refund buff can trigger on Warframes without Energy. 
*The Critical Chance Bonus sets minimum Critical Chance on weapons to 200%. Weapons that already possess critical chance above this value remain unaffected.
**When using the Vigilante Mod Set it is possible to get red crits.
*The Instant Reload buff can still be rolled even if the player unequips all weapons from their loadout.
*The Charm buff can proc while still in the loading screen and the audible sound the Smeeta makes when it procs Charm can be heard as well.
==Bugs==
*Sometimes, Warframe powers are unaffected by the critical chance buff.
*While using and the Reload buff activates, the player can fire the as if it had no arrow reload time.
*At random times the mod will stop working for the rest of the mission.
==Patch History==
es:Encanto
de:Glücksbringer
ru:Талисман
Category:Kavat Mods
Category:Mods
Category:Penjaga Mods
Category:Rare Mods
Category:Update 19
Category:Energy Restoration
Category:Shield Restoration
uk:Зачаровування
fr:Charme