School-Toughness

 is a type of ability that exists in different variations for the different Damage Schools. School-Toughnesses are passive abilities, which mean they are active as soon as the creature enters play.

Variations
' can range between 1 and 3. If the ability is not on a Creature, Weapon, or Armor, the ability will be cast on a Creature, like in the case of Black Horse Level 3.