Tom's Beast Sanctuary

Choose a willing friendly Beast within 30 feet of you. You can send that Beast into a dimensional sanctuary for them to reside in for an indefinite amount of time. While in this space, the creature cannot be harmed, and does not require food or water. While a Beast is in your dimensional sanctuary, it can gain the benefits of a long rest when you take one. 

Additionally, when casting this spell, you instead may choose a empty space within 30 feet of you and summon a beast from your dimensional sanctuary. The beast will appear at the designated space. 

Using a Higher-Level Spell Slot. You can send/summon an additional beast to/from your sanctuary for each spell slot level above 1.