There are 12 different magic % blocks / reduce in all. But 35 modifiers that have either block or reduce on them.
Standard 12 Magic Fixes
5% Reduce - Stern
6% Reduce - Sublime
7% Reduce - Infused
8% Reduce - Exceptional
11% Reduce - Harsh
15% Reduce - Stringent
20% Reduce - Ruthless
25% Reduce - Merciless
5% Block - Persevering
8% Block - Reliant
13% Block - Unwearied
15% Block - UnwaveringAdditional Magic Reduce Fixes
5% Reduce - Radiant
5% Reduce - Miraculous + 8% Melee Block
5% Reduce - Stupendous
5% Reduce - Mystic
5% Reduce - Immense
5% Reduce - Prevailing
5% Reduce - Trusted
5% Reduce - Momentous
5% Reduce - Forgotten
5% Reduce - Notable
7% Reduce - Assured + 5% Melee Block
7% Reduce - Solemn + 10% Ranged DodgeAdditional Magic Block Fixes
5% Block - Dignified 10% Ranged Dodge
5% Block - Majestic + 4% hit M 7% hit Ranged
5% Block - Peerless * 2% Block
5% Block - Esteemed * 5% Dodge
5% Block - Foretold * 2% Block
5% Block - Flourishing
5% Block - Meticulous
8% Block - Unequivocal + 9% hit Ranged
8% Block - Glimmering
8% Block - Divine * 5% Dodge
13% Block - Unparalleled