Bluetracker
Tracks Blizzard employees across various accounts.
Links to new Battlegrounds minions with actual mana costs on PlayHearthstone.com
Below are links to all the new minions for the Battlegrounds mode as they appear with actual mana costs on Playhearthstone.com. Only one link is broken, for the Overseer. They lack attack and health numbers, however, and the texts are no different from how they appear in the new mode.
Just wanted to share and ponder. This brain train started with wondering why Ghastcoiler is colored as a Priest minion.
-Nathrezim Overseer (link broken)
Mike Donais
These are not collectible cards, so if something looks like it has a low mana cost don't worry about it.