Alistair the Unnamed

Hexproof, Lifelink
This creature cannot damage another creature, player or Planeswalker. Instead, all damage that would be meant to be dealt by this creature would instead add that amount of Loyalty to a Planeswalker you control.
This creature has Hexproof so long as you control a Planeswalker or pay {2} when you cast Alistair the Unnamed.