Arcane Shift

Yes, but only if the battlefield has Contested status when cleanup occurs. This most commonly happens when you're the defender during combat, but also applies in other contested scenarios.

The key is understanding when you choose where to play the banished unit and how Contested status prevents the battlefield from becoming Uncontrolled.

When Arcane Shift resolves, the following happens:

The critical timing: the battlefield's control status is determined in step 4, before you choose where to play the unit in step 8.

The ability to replay to the same battlefield depends entirely on whether that battlefield has Contested status during cleanup step 4. Contested status is applied when a unit moves to or is played to a battlefield not controlled by that unit's controller (CR 184.3.a).

During cleanup, battlefields with no units become Uncontrolled unless they have Contested status (CR 322.6). Additionally, a defending player maintains control of a contested battlefield even while it's being contested (CR 184.4.b).

This means if the battlefield is contested when cleanup step 4 occurs, and you control it, the battlefield remains under your control and is a valid location to replay your unit in step 8.

During combat, the battlefield has Contested status, so cleanup step 4 does NOT make it Uncontrolled. As the defender, you maintain control of the battlefield even while it's contested. When the unit finalizes in step 8, the battlefield is still controlled by you and is a valid location to replay your unit.

However, Attackers cannot replay their units to the battlefield because attackers never control the battlefield they're attacking in the first place.

Contested status can be applied to a battlefield you control even when you're not initially the defender. Here's how this works:

Example scenario:

You can use Arcane Shift to bounce and replay your unit to Battlefield A in this scenario because:

Afterwards, Combat will be unstaged when only the enemy unit remains at A (CR 322.11), then restaged when you replay your unit (CR 322.10). However, the battlefield remains contested and under your control throughout. The enemy unit is still there, so the Contested status persists until combat resolves or one side leaves.

If the battlefield does not have Contested status, cleanup step 4 makes the battlefield Uncontrolled immediately (CR 184.4.c). This happens when you're at a battlefield alone with no opponent units present, or outside of any contested scenario (no showdown, no combat).

When the unit finalizes in step 8, the battlefield is no longer controlled by you and is not a valid location. You must replay the unit to your base or a different battlefield you control.