Tedi, Dream Guardian

Vigilance, Protection from blue and black
Tedi, Dream Guardian enters the battlefield with
a number of +0/+1 counters equal to half your
life total, rounded up. If you or Tedi would take
damage, instead remove that many +0/+1
counters from Tedi, Dream Guardian.
If Tedi, Dream Guardian would leave the battlefield, you may pay 10 life to put it into
your hand.