Serena, Defender of Stensia

Lifelink
When Serena, Defender of Stensia enters the battlefield, create a legendary 0/5 white spirit creature token with defender that's named Serenus, the Fallen.
As long as you control a creature named Serenus, the Fallen, Serena, Defender of Stensia has +1/+1 and indestructible.
"My brother still watches over me ever since he died fighting for me. And I know that while he is protecting me, I will always be safe."