Rayner, Enigmatic Recycler

Ward {1} (Whenever this creature becomes the target
of a spell or ability an opponent controls, counter it
unless that player pays 1.)
{t}: Sacrifice an artifact creature you control,
then create two 1/1 Thopter artifact creature
tokens with flying.
Undying (When this creature dies, if it had no +1/+1
counters on it, return it to the battlefield under its
owner's control with a +1/+1 counter on it.)