Relinquished

Ritual {1} (As an additional cost to cast this spell, sacrifice creatures with total mana value {1} or more.)Whenever Relinquished blocks, if it has no attached creature, attach attacking creature to Relinquished. Relinquished gains +X/+Y, where X and Y are the respective power an toughness of attached creature. Whenever Relinquished would die, sacrifice the attached creature instead. If a creature would be dettached from Relinquished without being sacrificed, give control of it to it's owner.