Careful Chronarch

When Careful Chronarch enters the battlefield,
return target instant or sorcery with mana value
3 or less from your graveyard to your hand.
Whenever you cast an instant or sorcery spell
with mana value 4 or greater, you may return
Careful Chronarch from the battlefield to its
owner's hand.
Self-preservation is a rare but valuable quality in
the League.