MArcomage

I think that the most annoying card is Avenging angel

Define "annoying card". :P

Order of White Lotus is hard to beat. Flare gem is pretty close though. Oh, and Cleansing, if your opponent happens to get it at the opportune moment. Overpower and vampire are pretty annoying, just in terms of their ability to burn you to the ground in no time at all.

MOONSHRINE !!! without the slightest doubt :p
Elemental storm ranks second...-.-*

Why Avenging angel is annoying? your aim is to destroy the opponents tower and with only 1 tower left he gets a 99 blow against you :-(

Sure... but since it's rare and only one out of 15 it's rarely played against me and I mostly end my games quite fast so my opponent does'nt really have enough time to accumulate ressources for expensiv cards.

Lotus is nice game-alternating card. Prince - maybe, too. Cleansing against undead deck is obviously overpowered, but doen't happen too often.

The only annoying thing in this game is brigand deck... and, maybe, moonshine.

Dwarven Miners :P
I have this card for the Alliance keyword in my deck but it keeps reappearing 2-3-4-1000 times simultaneously, even when i discard it :P
hehehe lol one of these days i'll have to remove it from the deck

most annoying card is overpowered imo and goblin sabouteur

Plague and last order combined with cards like sacrafice, "100 discards later, ...... this will never end"

Definitely Moonshrine.

The most annoying cards are goblin saboteur, trigger trap, hectic offense and tidal wave.

Gateway. I want to play it, but it's so damn expensive! Every time I've managed to play it I still get killed.
Traditionally annoying however, definitely Goblin saboteur. Not only annoying in-game, but annoying in deck-building as well, since you have to calculate how many <=8 wall-cards vs >8 cards you have, every single deck.

Goblin saboteur, Trigger trap, in that order.

How can you hate Trigger Trap. It's awesome.

trigger trap it's a really good card (in own hand). the annoying thing is that it ruins your strategy (if in opponent's hand) because you can't play a card and not even discard it. in my opinion it should be uncommon.
another annoying card: mana burn.

Really the best thing you can hope for to foil something like trigger trap is to present your opponent with a fork. Increase your wall by >8 on the same turn that you use the card opposite trigger trap, with your opponent having saboteur in his hand - now he gets either the benefit of one or the other, but not both. Or better yet, play the card opposite trigger trap right after your opponent has discarded a rare/uncommon to use in conjunction with vulture. It's a decent way to mitigate some of those punishing effects.

Or, just play your card slot the turn they get Trigger Trap (making it useless) or avoid playing that slot, as it pins their slot as well.

Or play your card when your opponent doesn't want to use Trigger Trap (like if he gets New Development).
Moonshine is probably the most annoying for me. Or Cleansing, if I'm playing the Undead deck.