1. Weakness 2. Tower Shield 3. Legion Shield 4. Single -70% class shields 5. Elemental/Spirit Shield.
Now, for the attacks:
1. Medusa 2. Frost Giant 3. Winter Moon 4. All Stun Spells 5. Power Nova
Therefore, from the information above, I can estimate the top most annoying spell for this time period only:
Storm Owl
A powerful 10 pip Storm Spell, that can obliterate you at low health when done with storm damage and blades as well as traps, and enchantments. This spell will often bring you to victory when it's you who casts it, but if it's the enemy who does, you are in great peril.
The most annoying attacking spell is definitely Call of Khrulu when used against me. Not only does it take moons to finish casting, but it can do a load of damage with the Darkmoor boss's cheats, and even heal the enemy up a ton!
I think the most annoying spell is Weakness, Spirit Armor (When i'm using my low lvl wizards to go through quests), Sirens, Basilisk, Efreet and especially STORM OWL!
Definitely Efreet. If you don't have a spell to shake off the 90% weakness, you're either gonna have to waste blades/traps or try to get someone to use a Cleanse Charm. Other than that, Call of Khrulu is really annoying because it heals them a ton, and it takes forever like Ra.
1. Heck Hound 2. Tower Shield 3. Weakness 4. Scarecrow (especially when Malistare casts it pretty much every single round) my (I luv my balance wizard) ^_^
Weakness, which I don't know why EVERY. SINGLE. MOB. IN. DRAGONSPYRE. has.. though in the later worlds, probably Medusa, that 2 round stun, then they can stun and medusa again, which happens sometimes
Evan Shadowflame 100 Fire Evan Seashield 100 Death
oh my glob its gotta be tower shield, so imagine yourself walking down wherever your questing like and then you fight a monster your like ok i got this they go first but thats not a problem you set up traps and blades &stuff then use the attack nope tower shield liek if u cri every tiem
The most annoying spell for me is definitely earthquake. Every time my friends and I see the spell, we always get so angry cause we lose all our blades and shields lol. Earthquake has been seen recently in Avalon for me with myth minions. Lol now I wish I shouldn't have sold that earthquake treasure card.
INSANE BOLT! Storm students stop taking advantage of my bad luck! Also tower shield because you're balance and with other schools you have only fire blades/iceblades/lifeblades/etc and you can get rid of it with the wand attack without using up any blades if you attack with an opposite school
vs 
my
Evan Shadowflame 
Evan Seashield 
and then you fight a monster your like ok i got this they go first but thats not a problem you set up traps and blades &stuff then use the attack nope tower shield 
Every time my friends and I see the spell, we always get so angry cause we lose all our blades and shields lol. Earthquake has been seen recently in Avalon for me with myth minions. Lol now I wish I shouldn't have sold that earthquake treasure card. 
