Unit — Cute Animal Ninja • Cost: 4 • ATK: 3 • HP: 4
Unstoppable by units if you have another Ninja.Unattackable by units if you have another Cute Animal.
White • Ninjutsu Tech II
Having a detector (or a Tower add-on) doesn't help against the unstoppable keywords. Even then, unstoppable attackers can ignore patrollers. — Sirlin