It is possible to build Shrieker Rush without having to play any games. (Probably with the other decks too.)
Pick your element as Darkness. (It makes the most when selling cards.
Take out and sell the following:
1* Black Dragon
4* Devourer
3* Parasite
1* Dusk Mantle
1* Steal
Buy and put the following in your deck:
14* Stone Pillars
6* Graboids
Take out and sell the following:
6* Obsidian Pillars
2* Steal
1* Nightfall
3* Drain Life
4* Aether Pillars
1* Spark
1* Lightning
1* Parallel Universe
1* Immortal
Buy and put the following in your deck:
3* Stone Pillars
6* Shriekers
Sell all of the cards that aren't the following, but keep a pillar:
Shriekers
Stone Pillars
Graboids
Buy one Short Sword and put it in place of the pillar.
Change your mark to time.
There you have it, Shrieker Rush.