Heilgar, Honor Incarnate

At the beginning of you end step, you may
sacrifice Heilgar. If you do, return to the battlefield target legendary permanent that was
put into your graveyard from the battlefield this
turn. It gain hexproof until the start of your next
turn.
Whenever another legendary creature you control
dies, you may pay {b}{b}{w}. If you do, return
Heilgar from your graveyard to the battlefield
tapped.