Also very good lazy peon decks are constructed for warlocks.Warlocks have great common and uncommon cards.I shall write you down such cards and the set they come from.
Heroes Of Azeroth:
Corruption :A great DoT (Damage over Time) that can trouble your opponent.
Fear: Can send away troublesome opposing allies
Grimdron: A warlock pet that is elusive but I wouldn't recommend because it eats away at your resources during the first rounds and because there are much better pets out there
Life Tap:A magnificent card.I have 4 of them in all 4 of my warlock decks.It gives you card advantage which is a factor in winning the game.
Sarmoth:Maybe the best pet and ally a warlock can have in his deck.Common and cheap.
Sever the cord:Since it is an instant you can play it when an opponent attacks your ally.This way by destroying your ally you might destroy a bigger opposing ally.Nice card but not as useful as others.
Shadow bolt:Great card since it deals 3 damage for 3 cost and card disposal if your opposed ally is destroyed.In lazy peons many have allies with 3 health or lower.
Steal essence:Handy card for healing damage from Life taps.I rarely use them.
Through the Dark Portal:
Curse of tongues:Useful card in lazy peons since opponent abilities cost one more!!!You can attach many of these wreaking your opponents deck.But keep in mind...not all decks run many abilities.
Eye Of Kilrog:A must in lazy peons I guess since you tear apart your opponents plans by discarding the right card and since you get to see what cards your opponent has, you can prepair yourself for what is coming next.
Morfiel: Another pet but does the same as CoT but it costs more,it is removed easier and eats up useful pet slots.
Mortal Delights:Never have used it and never will.Unless you can heal your hero quick enough but I dont recommend it.
Piztog:Another pet that offers an extra health to your allies.Great for rush decks since it boasts your small allies!!!
Ritual Sacrifice:Lovely card for when an ally is destroyed.You get to kill your ally (the warlock style) and deal 1 shadow damage to the opponent.
Shred Soul:Ally removal for only 3 cost???Insane!!!A must...since it removes an ally from the game.That means it cannot come back with annoying quests that bring back allies from graveyards.
FIRES OF OUTLAND:
Angrida:A pet I have never ever played.Again I think there are better pets...
Death Coil:Nice since it delays your opponent and deals damage to the ally for 1 cost.
Immolate:Another DoT that is well comboed with Incinerate
Incinerate:With Immolate attached on opposing hero you get to deal 4 damage to him.That is 5 damage all together in 1 round...Not bad at all...
Jar Soul:Nice ally removal for 4 and you get a pet cheaper.
MARCH OF THE LEGION:
Banish:Nice demon removal for just 1 cost.But how many play with demons at lazy peons???
Curse of Contagion:With this card you can have a small control on your opponents allies.Nice card that can do big damage if used properly.Since it is an Instant you can play it on your opponents round on an ally with 1 health,destroy him at the start of your turn and then attach it to another opposing ally.
Rulrin:No cost for this pet but apart from the untargetable and elusive I can see no other use since it can do nothing...It deals no damage because it has an attack of 0.Maybe it can be used as ammo for Ritual Sacrifice...But still not strong enough and takes up space in your deck.
Soul Inversion:For 1 cost you can either kill an opponent ally or make one ally of yours stronger with a health reduction.May come handy in both ways!!!
Swallow Soul:For 3 resources you interrupt an ally card and remove it from the game!!!NICE:)!!!
Thulthun:A must in lazy peons and in constucted.Since you only get to pay 2 for a massive ally with 3 health and 3 attack it also comes with a great power that stops most Alliance rush decks!!!
Warlock Training:May come in handy when you want to get rid of protectors or annoying allies.I have never used it so I cant say much about how useful it can actually be.
I hope I helped you out.The hard part is choosing what to play and how to play.I can tell you one thing:Anything you play is fun, win or lose!!!