You could argue that Acherus Veteran is the best choice here, but it doesn't really suit the deck. Kabal Lackey has weak stats and is useless, with or without secrets. Second-Rate Bruiser, while weak as a 5-drop, will not break your deck and is a good anti-aggro option.
1. Second-Rate Bruiser
2. Acherus Veteran
3. Kabal Lackey
Published Mar. 19th 2018