This card have a theme of spider infestation. If the Broodmother stay on the board for too long it will make both opponent and your deck infested with a Webspinner cards. This card can deny both your draw and your opponent's draw so I think it's balance. This card can also delay the game in fatigue situation because both players deck is constantly filled with Webspinner.
The wording on "At the start of each turn" is the same wording on Micro Machine card so the rate of infestation is quite fast. You must be careful using this card, you don't want it to stay on the board for too long because it can deny you a card you want but also want it to stay long enough to deny your opponent's draw.
A constant threat on the field, summoning 8/8 with Taunt every single turn! However, the catch is that the Protector himself doesn't have any attack, so the true offense he gives is the constant 8/8's he summons.