I was trying real hard to build a deck that focuses on burning (discarding) the opponents deck, and uses this as a winning condition, but I always failed miserably. Is there even a remote possibility of accomplishing this? I can see that this is totally impossibe with only the LCG cards, but could someone show me a few working decks using legacy cards?

before bannings -

Hastur version - saturnalia + behind the pallid mask

despite bannings (with 4 of rule)-

yog/shub/MU/neutral combo deck, using black moore estate + shining trap. (before errata) plus lot of draw / stalling (glimpse of the void) plus adoration of thoth / adoration of uphaut / time to reap to undrain all domains/ trapez / estate and deck opponent.

Is the deck viable with 3 of rule, plus errata - hard to say

I actually have a Milling / Discard / Control LCG deck that is working quite well.

It is made of Miskatonic, Yog, Hastur, and some Neutrals. The control aspect of it delays the opponent well enough so that the milling can occur. Once the blackmoor estates get in play, it's usually only a few turns before the game is over. Adding in the discard element also helps to slow the opponent down pretty well especially if you can hit them with some discards in the first few turns.

I'll try and post up the main cards of the deck soon.

Hi,

this is a discard legacy deck. Yog-Sothoth and Shub-Niggurath

2x EE R185 Brood of Bubastis
2x FC R92 •Wilbur Whateley, His Father's Son
3x EE R159 Hermetic Scholar
2x AE U165 Dread Curse of Azathoth
3x FR R91 Elder Thing Scientist
3x FR C99 Cloak of Tawil At-Umr
1x ASM F18 Artifact of the Lost Cities
1x EP M27 Alter Reality
2x AE C172 Unspeakable Resurrection
3x MN R107 Expectancy
3x ASM F12 Revelation of the Spheres
3x AE R173 Blackmoor Estate
3x FC R108 The Speaking Cells
3x ASM F11 Elder Thing
1x FR R104 •Shining Trapezohedron, The Darkest Jewel
3x EE R202 The Mother's Fury
1x FC R128 Assistant to Dr. West
3x AE C197 Burrowing Beneath
3x AKD F14 Thunder in the East
3x ASM F14 Glimpse of the Void
2x UT R103 Warping of Time

Glimpse of the Void+Elder Thing+The Mother's Fury --> slow adversary

Regards

Here's a very old (obviously legacy) Agency-Cthulhu-Yog-Neutral deck which worked quite well. It was built around the time "Masks of Nyarlathotep" came out, so lacks many good cards which emerged with Forgotten Cities and the asylum packs. Was built pre-Shining Trap errata, but that shouldn't kill it.

4x AE U24 Blackwood Office
2x AE R26 Dockside Speakeasy
3x FR R14 •Fire of Asshurbanipal, Bane of Ninevah
2x AE R120 Undersea Treasures
4x UT R70 Lair of the Deep Ones
3x FR R68 •Sacrificial Altar, Of Star-Born Stone
2x MN C95 Cannibal Ghast
2x EP M26 Elder Thing Scientist
2x AE R166 Dream Messenger
2x AE U167 Gathering at the Stones
2x UT C98 Calling down the Ancients
4x FR U100 Dampen Light
2x FR C101 Journey to the Other Side
2x EE C165 A Single Glimpse
2x AE R173 Blackmoor Estate
3x FR R104 •Shining Trapezohedron, The Darkest Jewel
2x MN R107 Expectancy
2x AE P04 Dreams of the Great Old One
1x UT R134 Strange Inheritance
2x UT U136 Arkham Historical Society
2x EP I45 Ancient Tomb

Total 50

I would definitely change it a bit nowadays, but back then it worked well. The Cannibal Ghast and Elder Thing Scientist provided early-game defence, then this deck just tries to eliminate all characters from play, every turn, while slowly milling the opponent. Frustrating to play against!

Oh, and about that deck above - you can use Dream Messenger to make anything a "Location" for the Fire to destroy... in case that wasn't obvious.