Tiny Basilisk

Tiny Basilisk
UnitBeastCost: 2ATK: 1 HP: 2
Deathtouch (Combat damage this deals to units or heroes, even to their armor, kills them.)
Tiny Basilisk is unattackable and unstoppable by tech 0 units. (Cannot be attacked by tech 0 units and can ignore tech 0 patrollers when attacking.)
Some overlooked it. They were better off.
GreenBalance Tech I

Deathtouch Rulings
Anything that checks for "dying from combat damage" such as Brave Knight or Gilded Glaxx does "die from combat damage" if deathtouch hits it. — Sirlin
Deathtouch does not stack. Having two instances of deathtouch is the same as having just one. — sharpo
Unstoppable Rulings
Having a detector (or a Tower add-on) doesn't help against the unstoppable keywords. Even then, unstoppable attackers can ignore patrollers. — Sirlin