Whenever a nontoken creature enters the battlefield under your control, you may pay {W}. If you do, create a 1/1 white Spirit creature token with flying.
{1}{W}, Sacrifice a Spirit: Target non-Spirit creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)
You can sacrifice any Spirit to activate the last ability, not just a Spirit token created by Spirit Bonds.
You decide whether to pay {W} as the triggered ability resolves. You may only pay {W} and create a Spirit token once per nontoken creature.