Click status effect to view detailed explanations, sources, synergies and counters.

Buffs[]

Positive effects on the unit.

Buff	Description
High Morale	Increases unit Attack Speed by 50% and removes Low Morale.
Invulnerable	Prevents all damage dealt to the unit.
Shield	Absorbs damage taken
Domineering Shield	Special Shield generated by Mantis
Bubble	Absorbs damage taken
Plague Miasma	Absorbs damage taken

Debuffs[]

Negative effects on the unit.

Debuff	Description
Bind	Can't attack or move -20% Unit Damage Reduction, -50% Healing received
Bleed	Deals damage over time
Blind	Decreases Accuracy by 1000
Burn	Deals damage over time
Crystallized	Improved version of Petrify. Cannot attack, move or trigger skills -20% Unit Damage Reduction, -50% Magic Resistance
Deterrence	-300 Critical Hit
Disease	-50% healing received
Emaciation	-20% Unit Damage Reduction and Defense
Freeze	Cannot attack, move or trigger skills
Frostbite	-50% Unit Damage Reduction, -150 Tenacity. Removed after taking damage 10 times.
Laceration	-25% Unit Defense, 30% damage/s
Low Morale	Decreases Attack Speed by 33% and removes High Morale
Overstrained	Cannot perform normal attacks
Paralysis	-50% Critical Damage, -20% Attack Speed, -200 Dodge
Petrify	Cannot attack, move or trigger skills -20% Unit Damage Reduction
Plague	Deals damage over time
Poison	Specific debuffs
Silence	Cannot trigger skills
Slow	Decreases movement speed
Static	-20% Magic Resistance
Stealth	Prevents unit damage dealt to the unit
Stun	Cannot attack, move or trigger skills
Time Stop	Cannot attack, move or trigger skills

Very similar to debuffs (so far), marks being specific in that they:

Are strictly faction-oriented
Are used as a specific marker that synergizes with specific skills of units and heroes in their faction
Stack and seem to activate effects based on a stack limit as a response to a trigger
Last until end of battle unless removed

It is unclear if marks can removed by regular dispel effects.