The Nalaar parents are better than the classic goblin Commander, in part, because they are cheaper and thus get to impact the game sooner
You might take away their fourth land or their preferred three drop but that won't actually do anything for two or three turns which greatly reduces the value of Blackmail being one mana
Falkenrath Noble, Bloodthirsty Aerialist, and Marauding Blight-Priest create layered drain engines
Four mana will let you Loot, draw and then discard, as much as you want
Now it picks up a collection of abilities from whatever you used to transform it, letting you do all kinds of cool tricks every turn
And if youre facing too many Equipment/Traps/snow permanents, Turn to Dust/Trapfinder's Trick/Freyalise's Radiance can help