Questline Warlock

General Mulligan: The Demon Seed, Tour Guide, Bloodbound Imp

Vs Control: same as General Mulligan + Runed Mithril Rod

Vs Aggro : Also keep of Nathrezim , Drain Soul and Soul Rend.

The goal is to take damage on your turns fast enough using the tour guide for 0 hero power deal 2 damage, the bloodbound imp, hero power etc and once they die, to resurrect it via the Raise Dead and also you can use 1 backfire to draw and deal damage to your hero, so that the quest can be finished fast enough (keep 1 for fatigue to damage your opponent when using the card). Also use the Weapon if available so that the cards in your hand get discounted so that you can do more shenaningans with Tamsim Roame using shadow spells.

As well, you can use Soul Rend for AOE clear and for discarding your deck so that you can reach fatigue (you should have already played Blightborn Tamsin before reaching fatigue so that the fatigue damage will damage your opponent instead). Basically, do your best to survive using the removal spells, draw fast enough and win in fatigue by damaging your opponent.