Glorious Protector + Icewind Stalwart + Teleportation Circle

Steps

1. At the beginning of your end step, Teleportation Circle triggers, blinking Glorious Protector.
2. Glorious Protector leaves and enters the battlefield, returning Icewind Stalwart from exile to the battlefield, and triggering both Icewind Stalwart and Glorious Protector's enters-the-battlefield abilities.
3. Resolve the Glorious Protector trigger, exiling Icewind Stalwart until Glorious Protector enters the battlefield.
4. Resolve the Icewind Stalwart trigger, blinking Glorious Protector.
5. Repeat from step 2.