Quest for a Broken Soul

Tap a legendary white creature you control: Put
a quest counter on this ordeal. When you are
dealt combat damage, remove a quest counter
from this ordeal. Remove 4 quest counters from
this ordeal, sacrifice it: Choose one:
• Return target creature from your graveyard
to the battlefield.
• Return target creature card you own from
exile to the battlefield.
• Gain control of target creature you own.