Lissandra, Witch Immemorial

Whenever a creature an opponent controls dies,
return it to the battlefield under your control.
It gains Decayed, and "This creature must attack its
owner if able."
Whenever Lissandra becomes the target of a spell or ability, she gains Indestructible and Hexproof until
end of turn. Tap her and put a stun counter on her.
This ability triggers only once each turn.
"Battles come and go. I am eternal."