There are multiple stat based modifiers. These either use a stat to determine battle conditions, or exclude units from play based on a stat.
Health
|
Beefcakes You can only summon units with 5 or more health.
Equalizer The initial health of all units is equal to that of the unit on either team with the highest base health.
 Anemic Max health, at the start of the battle, is 4. |
Attack
|
 Broken Arrows You cannot summon units with ranged attacks.
 Going the Distance You can only summon units with ranged attacks.
 Keep Your Distance You cannot summon units with melee power.
 Lost Magic You cannot summon units with magic attacks.  Might Makes Right You can only summon units with 3 or more ranged, magic, or melee power.
Up Close and Personal You can only summon units with melee power.
 Wands Out
You can only summon units with magic attacks
|
Speed |
Need for Speed You can only summon units with 3 or more speed.
 Units with the lowest speed attack first and have the highest chance to evade attacks. |
Armor |
Heavy Metal You can only summon armored units. 
Unprotected All units have 0 armor and cannot gain armor from archons or abilities. |
Mana Cost |
 Even Stevens You can only summon units with even mana costs.  Junior Varsity You can only summon units and archons that cost 6 or less mana.
Little League You can only summon units and archons that cost 4 or less mana.  Odd Ones Out You can only summon units with odd mana costs. |
Rarity |
 Elite Force
You can not summon common units.
 Lost Legendaries You cannot summon legendary units.  Rise of the Commons You can only summon rare and common units. |
Element |
 Shades of Gray Only Neutral units may be used.
 Taking Sides You cannot summon neutral units. |
