There are a number of status effects in Onmyoji. Understand what these effects mean can make a huge difference the players’ battle strategy.
Below is a list of status effects in the game. When a Shikigami has a status effect, status icons will show above its HP bar along with the number of turns remaining.
Buffs
Image  Effect  Description  Source Example 

Attack/Damage Increase  Attack/Damage increase by an X amount lasting for a finite number of turns  Character: Seimei, Kagura; Shikigami: Kamaitachi, Yamausagi, etc. 

Defense Increase  Defense increase by an X amount lasting for a finite number of turns  Shikigami: Hitotsume; Soul: Boroboroton 

Critical % Increase  Critical % increase by an X amount lasting for a finite number of turns  Shikigami: Lantern Soul, Ghost Minion Yelow  
Speed Increase  Speed increase by an X amount lasting for a finite number of turns  Shikigami: Maestro, Blue Imp; Soul: Three String 

Critical Damage Increase  Critical Damage increase by an X amount lasting for a finite number of turns  Shikigami: Shuzu; Character: Hiromasa 

Effect RES Increase  Effect RES increase by an X amount lasting for a finite number of turns  Shikigami: Kamaitachi  
Effect HIT Increase  Effect HIT increase by an X amount lasting for a finite number of turns  Shikigami: Koi  
Shield  A shield to absorb an X amount of damage for a finite number of turns  Shikigami: Oneeyed, Koi; Soul: Jizo Statue 
Debuffs
Image  Effect  Description  Source Example 

Provoked  Provoked Shikigamis will only use normal attacks targetting the provoker for a finite number of turns.  Shikigami: Samurai X, Tanuki, Red Imp  
Confused  Confused Shikigamis will only use normal attacks targetting random units for a finite number of turns.  Shikigami: Maestro; Soul: Temptress, Mimic 

Sleep  Shikigami will sleep for a finite number of turns unless woken up from getting attacked  Yumekui  
Frozen  Frozen Shikigamis cannot act for a finite number of turns  Shikigami: Yuki Onna; Soul: Snow Spirit 

Stunned/Shape Shifted  Stunned Shikigamis cannot act for a finite number of turns. Shape Shifted Shikigamis also cannot act for a finite number of turns and will have their Passive skills sealed. Both of these two effects cannot be dispelled.  Shikigami: Enma, Enenra, Yamausagi, and Komatsu  
Silenced  Silenced Shikigamis cannot use abilities but can use normal attack  
Soul Sealed  Equipped Souls are not taking effect  Shikigami: Hannya; Character: Yaobikuni 

Soul and Passive Sealed  Equipped Souls and Passive Abilities are not taking effect  Shikigami: Hannya; Character: Yaobikuni 

Life Decay  Loses an X amount of HP every turn for a finite number of turns. This is equal to Poison in other RPGs.  Shikigami: Kiyohime; Soul: Mimic; Character: Kagura 

Attack Decrease  Attack decrease by an X amount lasting for a finite number of turns  Shikigami: Twofaced Buddha; Character: Seimei 

Defense Decrease  Defense decrease by an X amount lasting for a finite number of turns  Shikigami: Arakawa Lord, Kamaitachi, Twofaced Buddha  
Critical % Decrease  Critical % decrease by an X amount lasting for a finite number of turns  Shikigami: Hououga  
Speed Decrease  Speed decrease by an X amount lasting for a finite number of turns  Shikigami: Ame Onna  
Critical Damage Decrease  Critical Damage decrease by an X amount lasting for a finite number of turns  
Effect HIT Decrease  Effect HIT decrease by an X amount lasting for a finite number of turns  Shikigami: Oguna  
Effect RES Decrease  Effect RES decrease by an X amount lasting for a finite number of turns  
Healing Effect Decrease  Healing Effect received decrease by an X amount lasting for a finite number of turns  Shikigami: Shiro Mujou; Character: Kagura 

Max HP Decrease  Max HP decrease by an X amount lasting for a finite number of turns  Character: Yaobikuni 
Many Shikigamis inflict status effects and the tables above merely give some examples of where the effects come from.