Board Thread:Plants vs. Zombies Heroes/@comment-5760976-20170218022256/@comment-4077536-20170218152813

Possible. Zombot Battlecruiser is apparently a 7-brain 5/5 with Gravestone and "Give a Zombie Shielded until the end of turn" ability. Invincible Castle costs 4 and also gives Shielded to plants, but permanently (in its lane, I imagine).