Izanagi
Effect Monster (Fairy / WIND / 6 Stars / ATK 2200 / DEF 1000)
You can Special Summon this card from your hand by removing from play 1 Spirit monster from your hand. Spirit monsters you control do not have to have their effects that return them to the hand activated.
You're talking about the second effect. What it means is that you can choose to use your Spirit Monsters' effects to return them to your hand or not.
Example. I control two Spirit Monsters (Inaba White Rabbit and Hino-Kagu-Tsuchi), as well as Izanagi. It comes to my End Phase, which is when both Spirit Monsters would return to my hand. I'd like Inaba White Rabbit to return, because it's weak, but I'd want to keep Hino-Kagu-Tsuchi on the field because it took a lot of trouble to get it out and it's powerful. Izanagi allows me to ignore the returning effect of Hino-Kagu-Tsuchi but still use the effect of Inaba White Rabbit, and my goals are achieved.
Izanagi is better than Spiritual Energy Settle Machine, because you can pick and choose which Spirit Monsters to keep on the field (instead of forcing them all to stay) and you don't have to pay the upkeep cost of discarding a card for it. On the other hand, Izanagi is a monster, so it's more vulnerable to being destroyed (but still, it's tougher than a Cyber Dragon if you do the sensible thing and keep it in Attack Position).
Mirror of Yata is another alternative, but it's an Equip Spell so it only affects one monster (and once it's equipped it's not optional). Still, it prevents a destruction by battle as well.