Armor

Armor is a mostly obscured stat from the player. It applies a damage reduction on damage taken if you have it, and a damage increase if you have a negative amount. This applies to all damage taken, except the damage from a Shrine of Blood.

Damage taken is multiplied by 1 - Armor / (100 + |Armor|) . (This should be a number between 0 and 2)

If you have positive armor:

• Your damage taken is multiplied by 100 / (100 + Armor).
• This is a number between 0 and 1.
• The formula for damage reduction is: Armor / (100 + Armor).

If you have negative armor:

• Your damage taken is multiplied by 2 - 100 / (100 - Armor).
• This is a number between 1 and 2.
• Note that the negative armor is subtracted, and two negatives make a positive.
• The formula for damage increase is: 100 / (100 - Armor) - 1.

Armor	Damage Reduction	Damage Multiplier
-80	-400.00%	1.44
-60	-150.00%	1.38
-20	-25.00%	1.17
-10	-11.00%	1.09
0	0.00%	1
1	1.00%	0.99
5	5.00%	0.95
10	9.00%	0.91
12	11.00%	0.89
15	13.00%	0.87
20	17.00%	0.83
50	33.00%	0.67
100	50.00%	0.5
500	83.00%	0.17
1000	91.00%	0.09
5000	98.00%	0.02
10000	99.00%	0.01

It would take 330 Rose BucklerRose Buckler
Reduce incoming damage while sprinting.
Increase armor by 30 (+30 per stack) while sprinting. (+30 armor while sprinting) to get a damage reduction of 99% while sprinting. This would amount to 9900 armor.

Sources of Armor

• Playing on Drizzle grants each player a hidden item which grants 70 armor.
• Acrid, Mercenary, Loader, and REX have 20 base armor.
• MUL-T has 12 base armor.
• MUL-T's utility skill Transport Mode grants him 200 armor while it's active.
• The Rose BucklerRose Buckler
  Reduce incoming damage while sprinting.
  Increase armor by 30 (+30 per stack) while sprinting. grants 30 armor while sprinting.
• The Effigy of Grief15sEffigy of Grief
  Drop a permanent effigy that cripples ALL characters inside. Can place up to 5.
  ALL characters within are slowed by 50% and have their armor reduced by 20. Can place up to 5. removes 20 armor from all characters in its radius while placed down.
• REX's Weaken/Natural Toxins removes 30 armor from targets hit.
• Shattering JusticeShattering Justice
  Reduce the armor of enemies after repeatedly striking them.
  After hitting an enemy 5 times, reduce their armor by 60 for 8 (+8 per stack) seconds. removes 60 armor from targets hit when fully stacked.
• Boss Monsters have base armor. See their individual pages.
• Clay Dunestrider's recovery attack, during which they will pull in all nearby characters, grants the Dunestrider 200 armor while active.
• Scavenger's item scavenging skill, grants it 200 armor while looking for an item.
• Jade Elephant45sJade Elephant
  Gain massive armor for 5 seconds.
  Gain 500 armor for 5 seconds. grants 500 armor while active.
• Spinel Tonic60sSpinel Tonic
  Gain a massive boost to ALL stats. Chance to gain an affliction that reduces ALL stats.
  Drink the Tonic, gaining a boost for 20 seconds. Increases damage by +100%. Increases attack speed by +70%. Increases armor by +20. Increases maximum health by +50%. Increases passive health regeneration by +300%. Increases movespeed by +30%.
  
  When the Tonic wears off, you have a 20% chance to gain a Tonic Affliction, reducing all of your stats by -5% (-5% per stack). grants 20 armor while active.
• Irradiant PearlIrradiant Pearl
  Increase ALL of your stats.
  Increases ALL stats by 10% (+10% per stack). multiplies armor by 1.1.