A new staple in Artifact decks for sure, any deck that reeeeally wants to tutor up the Clamp, and basically any deck that has 3+ good targets for it
Turning every artifact into a mana source enables explosive turns, and when paired with cards like Paradox Engine, it allows you to cast spells and untap permanents repeatedly, quickly spiraling into overwhelming advantage or outright wins
If X is 10 or more, double the number of +1/+1 counters on any number of other target creatures
In the "Savage Hunter" deck, rather than Izoni, Thousand-Eyed and Mask of Immolation, you'll find these two new cards perfect for multiplayer games with that Jund sacrifice deck: And in the "Knights' Charge" deck, rather than Shivan Dragon and Tajic, Legion's Edge, you'll find these two multiplayer-attacking powerhouses: As Melissa alluded to earlier, this is one of the ways they could make cards that were powerful for Brawl, without risking that the set would have cards you would badly need for Standard Constructed