Alianor, Cair Andros Guardian

Vigilance, first strike, persist
Whenever Alianor, Cair Andros Guardian blocks, other creatures you control gain +1/+1 until end of turn.
Fateful hour - As long as you have 5 or less life, Alianor, Cair Andros Guardian loses first strike, gains double strike and gets +1/+0.