It’s important to note that any damage will be absorbed by this shield, making all absorbs also universal shields. If there is a boss that takes universal shields, they will take absorbs that are individually cast. (Rebirth users, rejoice! Some bosses won’t take your absorb, but some will. Depends on the boss)
These are the shields the Ice school is known for. You guessed it; the tower shield. The other, slightly less common one is the legion shield. A universal shield takes a certain percentage off of any school-type damage before it hits you. A tower shield, specifically, halves the damage. A spell that does a 100 damage will only do 50. The legion shield takes off 30% damage.
SCHOOL SPECIFIC SHIELDS
These are the most numerous. There are school shields for every school except balance. There are different amounts of damage they take off as well. Everyone, starting at level 10, can get a -80% shield of their school for no training point cost. Others can be trained for one point each if you wish. Sabrina Greenstar, in the Commons, by Hilda Brewer, trains these spells
Each school, except for Balance, gets a spell with two -70% shields of the other members of its trio. The elemental trio (Storm, Fire, and Ice) can get the Glacial (Fire), Thermic (Storm), or Volcanic (Ice) shield. The spirit trio (Life, Death, and Myth) can get the Legend (Life), Dream (Death), or Ether (Myth) shield.
As you can see, the Volcanic shield gives the user two shields; one-70% storm, and one -70% fire.
Just because Balance isn’t a part of a trio, doesn’t mean it gets left out. Balance wizards get two different spells. One spell has the spirit trio shields, all at -50%. The other spell is the elemental shield.
NOTE: Damage over time’s (DOTs) do count as incoming damage, meaning that any shield placed will be used by the DOT. This is either helpful or just a nuisance.