A great moment for both WotCs reprint policy and their work with content creators
Since it won't stop your opponent's first Synchro/Xyz/Pendulum Summoned monster(s) from being in Attack Position, without removing this card prior to knowing what or whehter your opponent will Special Summon, you can add an effect which also switches all monsters that were Special Summoned this turn to Defense Position
The Professor reveals that Zarc is the darkness within Yuya and his counterparts, who are themselves remnants of Zarc's scattered essence, which has been compelling them to absorb each other so Zarc can be reconstituted and exact his revenge
For example, a Forest that's turned into a creature this way can still be tapped for
Finally, you can Link Summon Yubel and Unchained Soul of Sharvara into Unchained Soul of Rage, which then pops Unchained Soul of Sharvara's effect, meaning you can place Abominable Chamber of the Unchained onto the field