Kyran's Castellan

Defender
{u}: Kyran's Castellan loses defender and has
base toughness 2/2.
{u}{u}: If Kyran's Castellan is 2/2, it gains
flying and hexproof.
{u}{u}{u}: If Kyran's Castellan has hexproof,
return up to 3 nonland permanents to their
owner's hand. Activate this ability only once.