MC buffs.

Example of MC buffs:
Weapons
-Chance to critically strike an enemy
-Increases attack speed/decreases invulnerability time of enemies struck
-Deals extra damage when attacking an enemy from behind
-Cripples an enemy, decreasing their movespeed and action time
-Increases movespeed when striking an enemy or killing an enemy
-Destroys an enemy's face
-+20 Armor Penetration
-Can destroy enemy arrows mid-flight
-Gains attack damage as life decreases

Armor
-Chance to block a fatal blow once per 2 minutes (does not restore you to full health)
-33% less damage from ranged attacks
-33% less damage from explosions and other sources of AoE damage
-When you die, burns all enemies in a 4-block radius. Cooldown is tied to Fatal Survivor.
-When an ally near you dies, they temporarily respawn for 15 seconds, unable to take damage for the duration
-Once every 2 minutes, can go into stasis (invulnerable and drops creep aggro, but cannot take actions) for
2.5 seconds.
-When out of combat, gives Speed II buff. Cooldown is roughly 30 seconds after engaging in combat (you
don't deal or take damage to/from creeps)
-Once every 3 minutes, can be activated to slow every enemy within a 3-block radius.