Tideturner

Tideturner [NEW TEXT] [Hidden] (Hide now for [A] to react with later for [0].) When you play me, you may choose a unit you control at another location. Move me to its location and it to my original location. [OLD TEXT] [Hidden] (Hide now for [A] to react with later for [0].) When you play me, you may choose a friendly unit. Move me to its location and it to

Tideturner's trigger is optional. The controller of Tideturner may choose to trigger it when it is played and add it to the chain. It must have a legal target to be added to the chain.

Tideturner Q: What do the Hidden changes mean for Tideturner? It seems like I'm supposed to be able to choose a unit at another location. Tideturner is receiving minor errata, both to restrict its targeting to a unit you control and to make sure that it can target a unit at another location under these rules.

359.3.e.2. A target is illegal as the spell resolves if it no longer meets the targeting requirements of the spell, or if it has changed Zones to or from a NonBoard Zone. 359.3.e.3. If a target ceases to meet the targeting requirements while the spell is on the chain, then meets them again, it's a legal target. Example: A spell targets "a unit at a battlefie