Nurturing Presence

Enchant creature
Enchanted creature has "Whenever a creature you control enters, this creature gets +1/+1 until end of turn."
When Nurturing Presence enters, create a 1/1 white Spirit creature token with flying.

Innistrad: Double Feature

Innistrad: Crimson Vow

Nurturing Presence enters the battlefield and then its triggered ability causes a 1/1 Spirit to enter the battlefield. Assuming that Nurturing Presence is still on the battlefield as that first triggered ability resolves, the Spirit will cause the ability the enchanted creature has to trigger and it will get +1/+1 until end of turn.