For notes, tactics, and other details on conjuring and using this class of 'parry' or 'counter' spell with perfect blocks see Mystic Knight Shield Counters.
If successive perfect blocks are performed whilst the orb conjured from a previous perfect blocked enchanted shield are still active, the orbs' duration will be extended, though no new orb(s) will be created. The orbs will continue to inflict damage when extended by successive perfect blocks.
Blessed Riposte destroys a Skeleton Brute and 8 Skeletons.
A Mystic Knight executes two Perfect Blocks (Blessed Riposte) to annihilate a Skeleton Brute and 8 Skeletons in 9 seconds.
Blessed Riposte, Great Cannon combo vs Griffin
In this demonstration, a single Perfect Block (without Prescience) is used to fire two Great Cannons to slay a Griffin outright.
Blessed Riposte, Great Cannon combo vs 3 Living Armor
When combined with a Blessed Riposte or Frost Riposte, a Perfect Block executed in front of one or more Great Cannon sigils will produce a rapid-fire "Burst" combo.
A perfect block summons balls of enemy-seeking holy light.